The Ottoman Empire: Rise, Glory, Wars, and Fall of a Six-Century Dynasty

1. The Empire That Bridged Three Continents

The Ottoman Empire reached its peak of territorial expansion during Suleiman the Magnificent’s Reign (1520–1566), spanning parts of Europe, Asia, and North Africa.

For more than six centuries, the Ottoman Empire shaped the history of southeastern Europe, western Asia, and North Africa. Emerging from a small frontier principality in northwestern Anatolia around the end of the thirteenth century, it grew into one of the most influential states in world history. Its armies conquered major cities, its fleets contested control of important sea routes, and its rulers governed diverse populations across three continents.

The empire reached a defining moment in 1453, when Sultan Mehmed II captured Constantinople, ending the Byzantine Empire. Under later rulers, especially Suleiman the Magnificent, Ottoman political power, military organization, architecture, law, and literature flourished. Yet the empire also experienced succession struggles, rebellions, costly wars, territorial losses, and difficult attempts at reform.

Its history was not simply a story of conquest or decline. It was also the history of communities living under Ottoman rule, merchants connecting distant markets, religious institutions, ambitious officials, and rulers trying to preserve their dynasty.

The Ottoman Empire entered the First World War in 1914 and suffered defeat alongside the Central Powers. The sultanate was abolished in 1922, and the Republic of Türkiye was proclaimed in 1923. The empire disappeared, but its political, cultural, architectural, and historical legacy continues to influence the modern world.

Key facts

• Traditional Founding Date: Around 1299, associated with Osman I.

• Capital Cities: Söğüt and other early centers; Bursa from 1326; Edirne in the fourteenth century; Constantinople/Istanbul after 1453.

• Peak Period: Especially the fifteenth and sixteenth centuries, although the empire remained a major power afterward.

• Major Regions: Anatolia, the Balkans, the Middle East, parts of North Africa, and areas around the Black Sea and eastern Mediterranean.

• End of the Sultanate: 1 November 1922.

• Republic of Türkiye Proclaimed: 29 October 1923.

2. The Origins of the Ottoman Empire

The Ottoman state emerged in northwestern Anatolia during the late 13th century, as the Seljuk Sultanate of Rum weakened under Mongol domination. Osman I established a small Turkoman frontier principality near Söğüt, close to territories controlled by the Byzantine Empire. 

Its strategic location, military expansion, and ability to attract followers helped it grow from a regional beylik (principality) into a rising power. The traditional founding date is 1299, although the exact circumstances of its establishment remain debated because contemporary records are scarce.

Anatolia Before the Ottomans

• Byzantine Empire: Continued to control Constantinople and scattered territories, although its power in Anatolia had declined considerably.

• Seljuk Sultanate of Rum: Its political authority weakened after the Mongol victory in 1243.

• Turkish Beyliks: Independent or semi-independent principalities competed for land, revenue, and political influence.

• Mongol and Ilkhanid Influence: Mongol power affected the political environment of Anatolia, even as local rulers increasingly acted independently.

• Frontier Warfare: Raids, fortification campaigns, alliances, and territorial contests helped shape the early Ottoman state.

Key Origins and Major Developments

• The Decline of the Seljuk Sultanate: In 1243, Mongol forces defeated the Seljuks of Rum at the Battle of Köse Dağ. The sultanate subsequently came under Mongol influence, weakening central authority and allowing Turkoman principalities to expand across Anatolia.

• Osman I and Söğüt: Osman emerged as a regional leader among Turkoman frontier communities. His principality was centered around Söğüt and nearby territories in northwestern Anatolia, close to Byzantine-controlled lands. This location offered opportunities to expand into Byzantine border regions.

• The Battle of Bapheus (1302): Osman’s forces defeated a Byzantine force near Nicomedia, modern İzmit. The battle is considered a significant milestone in Ottoman expansion because it strengthened Osman’s regional reputation and weakened Byzantine control over parts of the surrounding countryside.

• Military Expansion and Alliances: Osman’s followers gained territory through raids, battles, local alliances, and the absorption of neighboring settlements. His forces benefited from political divisions among Anatolian principalities and the difficulties Byzantine authorities faced in defending their frontier.

• Mongol Domination and Its Impact: In 1243, Mongol forces defeated the Seljuk Sultanate of Rum at the Battle of Köse Dağ, decades before Osman I’s rise. Mongol influence weakened Seljuk authority and contributed to the political fragmentation of Anatolia. Osman’s principality emerged within this changing frontier environment. However, there is no strong contemporary evidence confirming a major direct battle or personal encounter between Osman I and Mongol forces.

• The Importance of Bithynia: Bithynia contained fertile agricultural land, fortified towns, and important routes connecting Anatolia with Constantinople. Expansion into this region provided access to resources and strengthened the Ottomans’ strategic position near the Sea of Marmara.

• The Capture of Bursa (1326): Bursa was captured by Ottoman forces under Osman’s son Orhan in 1326, traditionally associated with the final years of Osman’s life. Bursa became a major Ottoman administrative and economic center, providing the growing state with a stronger urban base.

• Osman’s Legacy: Osman established the ruling dynasty that would eventually govern one of history’s longest-lasting empires. His successors continued expanding into Byzantine territories and competing with neighboring principalities, transforming the small frontier state into a major regional power.

Historical Note: The traditional founding date of 1299 and many details of Osman’s early life remain debated because contemporary written records are limited.

3. Osman Gazi and the Rise of the Ottoman State

Ertuğrul Gazi

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Osman I (Osman Gazi)

Founder of the Ottoman Dynasty

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Malhun Hatun (Commonly Identified as his Wife)

 Rabia Bala Hatun (Relationship Details Debated)

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Orhan Gazi (Son and Successor)

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Murad I (Son of Orhan)

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Bayezid I (Son of Murad I)

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Later Ottoman Sultans

An Ottoman miniature portraying Osman I, founder of the Ottoman dynasty, created around 1580.

Osman I, also known as Osman Gazi, was the founder of the Ottoman dynasty, which eventually ruled one of history’s longest-lasting empires. Traditionally associated with the Kayı tribe of the Oghuz Turks, he emerged as a Turkoman frontier leader in northwestern Anatolia during the late 13th century. 

At the time, the Seljuk Sultanate of Rum had weakened under Mongol domination, while Byzantine territories faced growing pressure. Through military campaigns, political alliances, and territorial expansion, Osman established a principality that became the foundation of the Ottoman state.

Osman I’s Personal Life

• Birth and Origins: Osman was probably born around 1258, although his exact birth date is uncertain. Traditional Ottoman accounts identify his father as Ertuğrul and associate his family with the Kayı branch of the Oghuz Turks, but these genealogical details are not securely established by contemporary evidence.

• Family: Osman’s wife is commonly identified as Malhun Hatun, while some Ottoman traditions also mention Rabia Bala Hatun. The historical details of these relationships are debated. His son Orhan succeeded him and continued expanding Ottoman territory.

• Early Environment: Osman grew up in the frontier region of northwestern Anatolia, where Turkoman principalities competed for land and influence while confronting Byzantine border territories.

• Death: Osman’s death is generally placed around 1324–1326, although the exact year remains disputed.

From Kayı Leader to Founder of the Ottoman State

The traditional genealogy of Oghuz Khan divides his six sons into two branches: Bozok and Üçok. Their descendants are traditionally identified as the ancestors of the twenty-four Oghuz tribes.

• Establishing Regional Authority: By the late 13th century, Osman had emerged as a powerful local leader near Söğüt. His authority grew through alliances, military activity, and the acquisition of neighboring territory.

• Taking Advantage of Political Instability: Mongol domination had weakened the Seljuk political order, while Byzantine authorities struggled to maintain control over parts of their Anatolian frontier. These conditions created opportunities for Osman to expand his principality.

• Battle of Bapheus (1302): Osman’s forces defeated a Byzantine force near Nicomedia, modern İzmit. The victory strengthened his regional position and is often treated as a major milestone in the formation of Ottoman power.

• Expanding into Bithynia: Osman’s forces increased pressure on Byzantine settlements and rural districts near the Sea of Marmara. Control over surrounding countryside gave the emerging state access to agricultural resources, strategic routes, and additional followers.

• The Siege of Bursa: Ottoman forces besieged Bursa, a major Byzantine commercial centre. The city fell to Osman’s son Orhan in 1326, providing the Ottomans with an important urban and economic base.

• Establishing a Dynasty: Osman’s greatest achievement was creating a political authority that survived beyond his lifetime. Orhan consolidated the state, captured further Byzantine cities, and expanded Ottoman institutions, turning his father’s frontier principality into a more organized regional power.

Historical Note: Osman did not become emperor of a vast empire during his lifetime. He founded the dynasty and principality from which the Ottoman Empire developed under later rulers. The traditional founding date is around 1299, but the precise chronology and several details of Osman’s life remain uncertain because contemporary records are limited.

4. The Early Expansion and Rise of Ottoman Power

The Early Expansion and Rise of Ottoman Power

From a frontier principality to a growing empire

Date

Event / Campaign

Ottoman Leader

Result and Historical Significance

Key campaigns and territorial developments, c. late 13th century–1402

1. Expansion around Söğüt and Northwestern Anatolia

Date: Late 13th Century

Ottoman Leader: Osman I

Osman consolidated a frontier principality near Byzantine territories, establishing the foundations of Ottoman power.

2. Battle of Bapheus

Date: c. 1302

Ottoman Leader: Osman I

Ottoman forces defeated a Byzantine force, strengthening Osman’s position in Bithynia.

3. Campaigns around Byzantine Bithynia

Date: Early 14th Century

Ottoman Leader: Osman I

Ottoman forces expanded through raids, local alliances, and territorial gains around Byzantine settlements.

4. Expansion around Yenişehir and Nearby Strongholds

Date: c. 1300–1305

Ottoman Leader: Osman I

The Ottomans strengthened their position in the region between Söğüt and the fertile plains of Bithynia. Exact dates for individual acquisitions are uncertain.

5. Capture of Mudanya

Date: 1321 (Date Reported in Some Accounts)

Ottoman Leader: Osman I / Early Ottomans

Gave the Ottomans access to the Sea of Marmara; the precise chronology of early coastal gains is uncertain.

6. Conquest of Bursa

Date: 1326

Ottoman Leader: Orhan Gazi

Bursa fell to Ottoman forces and became a major political and economic center of the growing state.

7. Battle of Pelekanon

Date: 1329

Ottoman Leader: Orhan Gazi

Ottoman victory weakened Byzantine efforts to preserve control over its remaining territories in northwestern Anatolia.

8. Conquest of Nicaea (İznik)

Date: 1331

Ottoman Leader: Orhan Gazi

The important Byzantine city came under Ottoman control, strengthening their position in Bithynia.

9. Conquest of Nicomedia (İzmit)

Date: 1337

Ottoman Leader: Orhan Gazi

Ottoman control expanded along the southern coast of the Sea of Marmara.

10. Incorporation of the Karasi Principality

Date: 1345

Ottoman Leader: Orhan Gazi

The Ottomans absorbed a neighboring Turkoman principality, expanding their territory and strategic reach toward the Dardanelles.

11. Ottoman Foothold in Thrace and Capture of Gallipoli

Date: 1352–1354

Ottoman Leader: During the Reign of Orhan Gazi

The Ottomans established a lasting foothold in southeastern Europe, opening the way for further Balkan expansion.

12. Conquest of Adrianople (Edirne)

Date: 1361 (Traditional Date; Chronology Debated)

Ottoman Leader: Murad I

Edirne became a key Ottoman center in Europe and a base for campaigns into the Balkans.

13. Battle of Kosovo

Date: 1389

Ottoman Leader: Murad I

Ottoman forces fought a coalition led by Serbian Prince Lazar. Both leaders died, but Ottoman expansion in the Balkans continued under Bayezid I.

14. Battle of Nicopolis

Date: 1396

Ottoman Leader: Bayezid I

The Ottomans defeated a major Crusader army, reinforcing their influence in the Balkans and delaying efforts to reverse Ottoman expansion.

15. Battle of Ankara

Date: 1402

Ottoman Leader: Bayezid I

Timur defeated the Ottoman army and captured Bayezid. The defeat triggered a succession struggle known as the Ottoman Interregnum (1402–1413).

From a small frontier principality in Anatolia, the Ottomans expanded into a powerful state spanning parts of Asia and southeastern Europe.

Under Osman’s successors, particularly Orhan and Murad I, the Ottoman principality expanded from northwestern Anatolia into the Balkans. This transformation was driven by military campaigns, control of important towns, political alliances, and the gradual development of administrative institutions. The Ottomans benefited from divisions among neighboring powers, but their success also depended on their ability to hold territory and organize resources after conquest.

The capture of Bursa in 1326 gave the dynasty a major urban center. Ottoman forces subsequently gained positions along the Sea of Marmara and crossed into southeastern Europe. By the late fourteenth century, they had become a powerful regional state whose influence extended across much of the Balkans and Anatolia.

Expansion was neither uninterrupted nor inevitable. The Ottomans faced resistance, competing Turkish principalities, Byzantine opposition, and coalitions of European rulers. Their rise was the result of successive political and military achievements rather than a single decisive event.

Orhan: Building the state

Orhan, Osman’s son, ruled during a crucial period of institutional growth.

• Bursa, 1326: Its capture provided a major urban center and helped consolidate Ottoman authority in northwestern Anatolia.

• Expansion Around the Sea of Marmara: Ottoman control spread toward important settlements and crossing points between Anatolia and Europe.

• Administrative Development: The growing principality required more organized systems of taxation, governance, and military service.

• Move into Europe: Ottoman involvement across the straits established the basis for sustained expansion into the Balkans.

Crossing into the Balkans

Ottoman expansion into southeastern Europe began during the reign of Orhan Gazi (c. 1324–1362), when Byzantine political conflicts gave Ottoman forces opportunities to intervene in Thrace. Byzantine Emperor John VI Kantakouzenos sought Orhan’s military assistance during struggles for the imperial throne. 

Ottoman troops crossed from Anatolia to support his faction, while Orhan strengthened the alliance through his marriage to Kantakouzenos’s daughter, Theodora, in 1346. These interventions gave the Ottomans military experience and access to territories across the Dardanelles.

Ottoman intervention in Byzantine conflicts (1340s–1350s): Orhan’s forces supported Kantakouzenos in Byzantine power struggles and conducted military operations in Thrace. Ottoman involvement began partly through an alliance with Byzantium, rather than as a straightforward invasion from the outset.

• The Foothold at Çimpe (c. 1352): Ottoman forces under Orhan’s son Süleyman Pasha established a base at the fortress of Çimpe on the Gallipoli Peninsula. This gave them a foothold on the European side of the Dardanelles and facilitated the movement of troops into Thrace.

• The Capture of Gallipoli (1354): A major earthquake damaged fortifications in the area. Süleyman Pasha’s forces occupied Gallipoli, an important port and fortress, and established a more permanent military presence. The occupation transformed the Ottoman position in Europe from intermittent intervention into a base for territorial expansion.

• Expansion into Thrace: From Gallipoli, Ottoman forces advanced inland, raiding and occupying strategic settlements. The weakening of Byzantine authority and divisions among Balkan powers helped them consolidate their position.

• The Road toward Adrianople: Ottoman expansion continued under Orhan’s successors. Adrianople (modern Edirne) came under Ottoman control during Murad I’s reign, traditionally dated to 1361, although the exact chronology is debated. It became a major base for further campaigns in the Balkans.

Historical Significance: The foothold at Çimpe and occupation of Gallipoli gave the Ottomans a lasting strategic position in Europe. Their subsequent expansion resulted from military campaigns, political alliances, settlement, and the fragmentation of regional powers—not from a single conquest alone.

Murad I and the growth of Ottoman power

Murad I, who ruled from approximately 1362 to 1389, presided over significant expansion in southeastern Europe.

• Edirne: The city, known in Europe as Adrianople, became an important Ottoman center and eventually the empire’s principal capital before the conquest of Constantinople.

• Balkan Campaigns: Ottoman forces expanded their influence over parts of Thrace, Macedonia, and neighboring regions.

• Military and Administrative Organization: As the state grew, the sultan’s government developed more structured methods of managing troops, officials, and conquered territories.

• Battle of Kosovo, 1389: Ottoman forces fought a coalition of Balkan rulers. Sultan Murad I was killed during the conflict, but the battle did not end Ottoman expansion.

The Battle of Kosovo and its Aftermath

The Battle of Kosovo was fought on 15 June 1389 according to the Julian calendar (28 June in the modern Gregorian calendar) on Kosovo Field near Priština. The Ottoman army, led by Sultan Murad I, fought a coalition centered on the Serbian forces of Prince Lazar Hrebeljanović, supported by other regional forces, including a Bosnian contingent sent by King Tvrtko I. 

Both Murad and Lazar died, making the battle a major turning point in Ottoman and Balkan history. The precise course of the fighting and its immediate military outcome remain disputed because contemporary accounts are limited and sometimes contradictory.

An 1870 painting portraying the Battle of [Kosovo], illustrating the military confrontation and the forces involved.

Key Events and Consequences

• Ottoman Expansion Before the Battle: Ottoman power had already expanded into the Balkans. The Ottoman victory at the Battle of Maritsa in 1371 had weakened several south Serbian lords, some of whom subsequently accepted Ottoman over lordship. Kosovo was part of the continuing struggle over regional power, not the beginning of Ottoman expansion in Europe.

• The Opposing Forces: Murad I commanded the Ottoman army, accompanied by his sons Bayezid and Yakub. Prince Lazar led the Serbian contingent, while Vuk Branković and forces sent by the Bosnian king Tvrtko I were also associated with the coalition. The exact size and full composition of both armies are unknown.

• The Deaths of Murad I and Prince Lazar: Murad was killed during or immediately after the fighting, but accounts of how he died differ. Lazar was captured and executed. Their deaths are among the best-established facts of the battle, although many details surrounding them come from later narratives.

• Bayezid I’s Succession: Murad’s son Bayezid assumed the sultanate after his father’s death. Ottoman accounts report that Bayezid ordered his brother Yakub killed during the succession crisis. Bayezid’s accession preserved the ruling dynasty despite the sultan’s death on the battlefield.

• The Immediate Military Outcome: The battle’s result is not easily classified as a decisive victory for either side. The Ottomans retained their political and military organization, while Serbia suffered the loss of its ruler and many nobles. Ottoman forces withdrew to secure the succession, and early reports from some Christian sources described the battle as a victory for their side.

• Serbia’s Changing Political Position: In the aftermath, Lazar’s widow, Milica, accepted Ottoman overlordship on behalf of her son Stefan Lazarević. Stefan later became an Ottoman vassal and supplied troops for Bayezid’s campaigns, including the Battle of Nicopolis in 1396. Serbia retained a degree of internal rule while becoming increasingly tied to Ottoman power.

• The Growth of the Kosovo Legend: Over subsequent centuries, the battle became central to Serbian historical memory, with Prince Lazar portrayed as a martyr and Miloš Obilić celebrated in later tradition as Murad’s assassin. The details of Obilić’s role and stories of betrayal by Vuk Branković are not securely established by contemporary evidence. Ottoman accounts also developed their own narratives of Murad’s death and martyrdom.

Historical Significance: Kosovo did not instantly bring all Serbia under direct Ottoman rule. Instead, it weakened the Serbian political leadership while the Ottoman dynasty survived Murad’s death and continued its expansion through military pressure, vassalage, and political alliances.

Bayezid I and Further Expansion

Bayezid I, who ruled from 1389 to 1402, pursued a more aggressive policy of consolidation and expansion.

• Centralization: He sought to strengthen the sultan’s control over Ottoman territories and subordinate competing rulers.

• Battle of Nicopolis, 1396: Ottoman forces defeated a major crusading army assembled by European Christian powers. The defeat weakened the crusaders’ attempt to challenge Ottoman expansion in the Balkans.

• Pressure on Constantinople: Bayezid intensified pressure on the Byzantine capital, although he did not capture it.

• Anatolian Rivals: His attempts to bring other Turkish principalities under Ottoman control brought him into conflict with Timur, the Central Asian ruler whose empire was expanding westward.

Bayezid’s campaigns greatly increased Ottoman power, but rapid expansion also created political enemies and left the state vulnerable to a major confrontation. That confrontation came in 1402 at the Battle of Ankara, where Timur defeated and captured Bayezid. The resulting crisis plunged the Ottoman dynasty into a struggle over succession and survival.

5. The Crisis of 1402 and the Ottoman Interregnum

At the beginning of the fifteenth century, the Ottoman state appeared to be approaching dominance over much of Anatolia and the Balkans. Sultan Bayezid I had expanded rapidly, challenged neighboring rulers, and placed Constantinople under severe pressure. However, another powerful ruler was advancing from Central Asia: Timur, also known as Tamerlane. 

His empire stretched across large parts of Central Asia, Persia, and neighboring regions, and he sought to establish his own authority over territories claimed by rival rulers. Bayezid’s expansion into Anatolia brought him into direct conflict with Timur, particularly as both rulers became involved in the affairs of Anatolian principalities. 

Their confrontation at Ankara in 1402 ended in a catastrophic Ottoman defeat. Bayezid was captured, his centralized state weakened, and his sons began fighting over the succession. For more than a decade, the dynasty struggled to recover.

The Road to Ankara

• Bayezid’s Expansion: The sultan sought to bring rival Anatolian principalities under Ottoman control.

• Timur’s Demands: Timur intervened in Anatolian politics and supported rulers who had lost territory to the Ottomans.

• Rival Imperial Ambitions: Neither ruler was willing to accept the other’s dominance in the region.

• Military Confrontation: Their competing claims culminated in the Battle of Ankara in July 1402.

The Battle of Ankara — 1402

The Ottoman and Timurid armies fought near Ankara in central Anatolia. Timur’s forces defeated Bayezid’s army, and Bayezid was taken prisoner.

• Outcome: A decisive Timurid victory.

• Immediate Consequence: Ottoman central authority fractured, and previously subdued Anatolian rulers regained opportunities to recover their territories.

• Bayezid’s Fate: He died in captivity in 1403.

• Historical Significance: The defeat interrupted Ottoman expansion and created a succession crisis that threatened the dynasty’s survival.

The Ottoman Interregnum — 1402–1413

After Bayezid’s capture and death, his sons fought one another for control of the remaining Ottoman territories. The period is known as the Ottoman Interregnum, although it was also a civil war among rival princes.

• Süleyman Çelebi: Established authority over Ottoman territories in parts of the Balkans.

• İsa Çelebi: Contested power in Anatolia.

• Musa Çelebi: Became a major contender and fought for control of territories held by his brothers.

• Mehmed Çelebi: Gradually strengthened his position through military campaigns and shifting alliances.

Neighboring powers and regional rulers exploited the division. The Byzantine Empire and several Balkan states gained room to maneuver, while Anatolian principalities reasserted their independence.

Mehmed I Restores the Dynasty (1413–1421)

The Ottoman Empire nearly collapsed after Sultan Bayezid I was defeated and captured by the Central Asian conqueror Timur at the Battle of Ankara on 28 July 1402. Following Bayezid’s death in captivity in 1403, his surviving sons began fighting one another for control of the Ottoman territories. This struggle, known as the Ottoman Interregnum (1402–1413), divided the dynasty and weakened the state.

• The Ottoman Empire Divided: Timur dismantled much of Bayezid’s territorial expansion in Anatolia, restoring several Turkish principalities that the Ottomans had previously conquered. The remaining Ottoman lands became divided among Bayezid’s sons. Süleyman Çelebi established his authority in Edirne and Rumelia, İsa Çelebi contested control of Bursa and western Anatolia, while Mehmed Çelebi maintained his power around Amasya and Tokat. Musa Çelebi later emerged as another major contender.

• Mehmed Builds His Support: Based in northeastern Anatolia, Mehmed gradually strengthened his position through military campaigns, political alliances and diplomacy. He also encouraged his brother Musa to challenge Süleyman in the Balkans. Musa eventually defeated Süleyman and took control of Edirne in 1411, but their alliance with Mehmed did not last. Musa pursued his own policies and became a rival to his brother.

• Alliance with Byzantium and Serbia: Mehmed recognised that defeating Musa required support beyond his own forces. He established cooperation with Byzantine Emperor Manuel II Palaiologos, whose government provided assistance in crossing the straits between Anatolia and Europe. Serbian ruler Stefan Lazarević and several Balkan commanders also supported Mehmed. These alliances helped him gather the military strength needed to challenge Musa.

• The Battle of Çamurlu (5 July 1413): The decisive confrontation took place at Çamurlu, near present-day Samokov in Bulgaria. Mehmed’s forces defeated Musa’s army. Musa was captured while attempting to escape and was subsequently killed. With his principal rival eliminated, Mehmed became the sole ruler of the Ottoman territories and ended the Interregnum.

• Reuniting the Ottoman Territories: After securing the throne, Mehmed turned his attention to restoring authority in both the Balkans and Anatolia. He reached agreements with Byzantine and Balkan powers, while also campaigning against Anatolian rulers who had regained independence during the civil war. He brought several former Ottoman territories back under his authority, although he did not recover every possession held by his father before the Battle of Ankara.

• Restoring Political Stability: Mehmed worked to rebuild the administration and military organization weakened by years of internal conflict. He relied on experienced officials, frontier commanders and established political institutions. His diplomatic approach also gave the state time to recover rather than immediately reopening major conflicts on every front.

• Historical Significance: Mehmed I ruled from 1413 until his death in 1421. He is often called the second founder of the Ottoman state because he reunited the divided dynasty and restored its political authority after one of the most dangerous succession crises in Ottoman history. His achievement gave his son, Murad II, a functioning state to inherit and provided the foundation for the Ottoman expansion that followed.

Important Distinction: Mehmed did not simply restore the empire to exactly the same borders it had under Bayezid I. Several Anatolian principalities remained outside direct Ottoman control, and the state was still recovering from the defeat of 1402. His greatest achievement was preserving the dynasty and re-establishing a unified Ottoman government.

6. Mehmed II and the Conquest of Constantinople

Portrait of Mehmed II by Italian painter Gentile Bellini, dating to 1480.

The Fall of Constantinople

6 April – 29 May 1453

Battle Information

Date: 6 April – 29 May 1453 (53 days).

Location: Constantinople, Byzantine Empire (present-day Istanbul, Turkey).

Result: Ottoman victory; Constantinople captured and the Byzantine Empire brought to an end.

Territorial Changes: Constantinople and the remaining Byzantine imperial territories came under Ottoman control. The city became the Ottoman imperial capital.

Belligerents

Ottoman Empire:

• Ottoman imperial army
• Janissary corps
• Anatolian and Rumelian provincial troops
• Irregular troops and auxiliary forces
• Ottoman fleet

Defending forces:

• Byzantine Empire
• Republic of Genoa (individual volunteers and contingents)
• Republic of Venice
• Other foreign volunteers, including Catalan and other Italian contingents

Foreign participation did not always represent formal state-wide military involvement. Genoese Pera, for example, maintained an officially neutral position.

Commanders and Leaders

Ottoman Empire:

• Mehmed II — Sultan and supreme commander
• Çandarlı Halil Pasha — Grand Vizier
• Zağanos Pasha — Senior Ottoman commander
• Mahmud Pasha — Ottoman military commander
• Karaca Pasha — Ottoman commander
• Süleyman Baltoghlu — Admiral of the Ottoman fleet during the siege

Defending forces:

• Constantine XI Palaiologos — Byzantine Emperor (killed)
• Giovanni Giustiniani Longo — Genoese commander of the land defences (wounded)
• Loukas Notaras — Byzantine Grand Duke
• Orhan Çelebi — Ottoman dynastic claimant supporting the defenders
• Gabriele Trevisano — Venetian commander
• Alviso Diedo — Venetian naval commander

Strength

Ottoman Empire — Land Forces:

• Approximately 80,000–100,000 troops in commonly cited modern estimates.
• Included regular provincial troops, irregular forces and elite Janissaries.
• Exact numbers and the breakdown of individual units remain disputed.

Ottoman Empire — Naval Forces:

• More than 100 vessels in commonly cited estimates.
• Some historical accounts report a fleet exceeding 120 ships.
• Included galleys, smaller vessels and transport ships.

Defending Forces — Land Forces:

• Approximately 7,000–8,000 defenders in commonly cited estimates.
• Included Byzantine soldiers and foreign volunteers.
• George Sphrantzes' figures, often cited in discussions of the defence, give 4,773 Greeks and approximately 2,000 foreigners; the figures require caution because of questions about their interpretation.

Defending Forces — Naval Forces:

• Approximately 26 ships in commonly cited estimates.
• Included Byzantine, Venetian, Genoese and other Christian vessels.

Casualties and Losses

Ottoman Empire:

• Heavy military losses during the prolonged siege and final assaults.
• Exact Ottoman military death toll not reliably established.

Byzantine and Allied Defenders:

• Approximately 4,000 Byzantine Greeks killed, according to David Nicolle.
• More than 550 Venetian civilians killed, according to the figures cited by Nicolle.
• Approximately 30,000 people enslaved or sold, according to M. J. Akbar.
• Constantine XI Palaiologos — killed during the final assault.
• Giovanni Giustiniani Longo — wounded during the final fighting and later died on Chios.

These figures come from different historical accounts and refer to different groups and categories. They are reported estimates, not a single independently verified casualty total. The 4,000 figure is reported as Greek deaths, not exclusively civilian deaths.

OTTOMAN VICTORY

Historical estimates vary between contemporary accounts and modern historians. Exact troop strengths, naval numbers and casualty totals cannot be established with certainty.

Historical References: Steven Runciman, The Fall of Constantinople 1453; David Nicolle, Constantinople 1453: The End of Byzantium (2000), pp. 81–84; M. J. Akbar, The Shade of Swords (2002); Marios Philippides and Walter K. Hanak, The Siege and the Fall of Constantinople in 1453.

Constantinople: The Dream of a Sultan

The conquest of Constantinople was one of the greatest ambitions of Sultan Mehmed II. His determination was often connected with the famous prophetic saying:

"Constantinople shall be conquered indeed; what a wonderful leader will that leader be, and what a wonderful army will that army be."

This saying, attributed to Prophet Muhammad (PBUH), became closely associated with Mehmed II and his conquest. Although no reliable contemporary historical evidence confirms that Mehmed experienced a personal dream about capturing Constantinople, the religious tradition helped strengthen the spiritual significance attached to the campaign.

When Mehmed ascended the Ottoman throne in 1451, he began preparing for the conquest of the Byzantine capital. On 29 May 1453, after a 53-day siege, his forces captured Constantinople, bringing the Byzantine Empire to an end and establishing the city as the new Ottoman imperial capital.

References: Sahih al-Bukhari (the hadith concerning the first expedition against Constantinople); Halil İnalcık, The Ottoman Empire: The Classical Age 1300–1600; Steven Runciman, The Fall of Constantinople 1453; Marios Philippides and Walter K. Hanak, The Siege and the Fall of Constantinople in 1453.

The Conquest of Constantinople

The Fall of Constantinople took place on 29 May 1453, when the Ottoman army, commanded by Sultan Mehmed II, captured the Byzantine capital after a 53-day siege that began on 6 April. The city’s defenders, led by Emperor Constantine XI Palaiologos, were overwhelmed by the much larger Ottoman force, supported by powerful cannons that breached Constantinople’s famous defensive walls.

The conquest brought the Byzantine Empire to an end after nearly 1,500 years of Roman imperial history. Mehmed II made Constantinople the new Ottoman capital, replacing Edirne. The fall of the city became a major turning point in world history, often marking the end of the medieval period and the beginning of a new era in which gunpowder artillery transformed siege warfare.

Preparations for the Conquest of Constantinople

When Mehmed II succeeded his father, Sultan Murad II, in 1451, he was only 19 years old. Many European rulers underestimated the young sultan and believed his inexperience would prevent him from challenging Christian power in the Balkans and the Aegean. Although Mehmed initially welcomed European envoys with friendly words, his actions soon revealed his determination to capture Constantinople.

• Construction of Rumeli Hisarı (1452): In early 1452, Mehmed ordered the construction of a powerful fortress on the European shore of the Bosphorus, several miles north of Constantinople. Known as Rumeli Hisarı, it stood directly opposite Anadolu Hisarı, a fortress built by his great-grandfather, Bayezid I. Together, the two fortresses gave the Ottomans control over the Bosphorus and allowed them to restrict ships travelling between the Black Sea and the Mediterranean.

• The Meaning of Boğazkesen: The fortress was also called Boğazkesen, meaning “Strait-Blocker” or “Throat-Cutter.” The name reflected its strategic purpose: to control the narrow waterway and prevent supplies or military assistance from reaching Constantinople by sea.

• Blocking Byzantine Reinforcements: In October 1452, Mehmed ordered Turakhan Beg to station a large Ottoman force in the Peloponnese. Its purpose was to prevent Constantine XI’s brothers, Thomas and Demetrios Palaiologos, who governed parts of southern Greece, from sending military assistance to Constantinople during the coming siege.

• Preparing the Roads for Ottoman Cannons: Karaca Pasha, the Ottoman governor of Rumelia, organized repairs to the roads between Edirne (Adrianople) and Constantinople. Bridges were strengthened to carry the enormous siege cannons. Fifty carpenters and approximately 200 artisans were also assigned to reinforce the roads wherever necessary. These preparations were essential for transporting the heavy artillery towards the Byzantine capital.

Sultan Mehmed II's Speech to his Soldiers

According to the Greek historian Michael Critobulus, Mehmed II addressed his soldiers before the siege. His speech reminded them of the struggles through which their ancestors had established the Ottoman state and passed it down through generations.

"My friends and men of my empire! You all know very well that our forefathers secured this kingdom that we now hold at the cost of many struggles and very great dangers and that, having passed it along in succession from their fathers, from father to son, they handed it down to me. For some of the oldest of you were sharers in many of the exploits carried through by them—those at least of you who are of maturer years—and the younger of you have heard of these deeds from your fathers. They are not such very ancient events nor of such a sort as to be forgotten through the lapse of time. Still, the eyewitness of those who have seen testifies better than does the hearing of deeds that happened but yesterday or the day before."

Source: Michael Critobulus, as quoted in The Fall of Constantinople (the speech excerpt supplied here ends at this point).

These preparations demonstrate that the conquest was not simply a sudden military attack. Mehmed had worked to control the Bosphorus, prevent reinforcements from reaching the city, secure the transport routes for his artillery, and prepare his army for the siege ahead.

Siege of Constantinople (6 April–29 May 1453)

• The Ottoman Siege 6 April 1453:  Sultan Mehmed II deployed land forces and a large fleet around Constantinople, targeting its remaining Byzantine strongholds, defensive walls, and maritime supply routes.

• Capture of Byzantine Strongholds: At the beginning of the siege, Ottoman troops captured the fortress of Therapia on the Bosphorus and a smaller castle near the village of Studius on the Sea of Marmara. The Princes' Islands were also likely captured by the Ottoman fleet under Admiral Suleiman Baltoghlu.

• Ottoman Artillery Bombardment: Ottoman cannons bombarded Constantinople's land walls for several weeks. Their slow rate of fire and limited accuracy allowed Byzantine defenders to repair much of the damage between bombardments. The Ottoman artillery nevertheless weakened sections of the fortifications through repeated attacks.

• The Christian Fleet Breaks Through: A defensive chain stretched across the entrance to the Golden Horn, preventing Ottoman ships from entering the harbor. On 20 April, four Christian ships—a Byzantine transport and three Genoese ships carrying provisions—fought their way through the Ottoman blockade and entered the Golden Horn. The incident raised the defenders' morale. Baltoghlu was reportedly wounded during the engagement.

• Punishment of Baltoghlu: Following the failure to stop the Christian ships, Mehmed removed Baltoghlu from command, confiscated his property and ordered him to be whipped. The Ottoman fleet continued its operations against the harbor.

• Ottoman Ships Transported Overland: On 22 April, Mehmed ordered Ottoman ships to be transported overland across the hills of Galata on greased wooden tracks and lowered into the Golden Horn. This operation bypassed the defensive chain and placed Ottoman vessels inside the harbor, forcing the Byzantine defenders to distribute more troops along the sea walls.

• Attempt to Destroy the Ottoman Fleet: On the night of 28 April, the defenders attempted to destroy Ottoman ships in the Golden Horn using fire ships. The operation failed, and the attackers suffered casualties. Approximately 40 Italian sailors escaped from their sinking vessels and reached the northern shore, where Mehmed ordered them impaled in view of the defenders. In retaliation, the Byzantines executed 260 Ottoman prisoners at the city walls.

• Repeated Assaults on the Land Walls: Ottoman forces launched several frontal attacks against Constantinople's land fortifications. These attacks resulted in heavy Ottoman losses but did not achieve a decisive breakthrough. Venetian surgeon and eyewitness Niccolò Barbaro recorded the fighting in his diary.

• Repeated Ottoman Frontal Assaults: Ottoman forces launched several direct attacks against Constantinople’s land walls, but these assaults repeatedly failed at a high cost. Venetian surgeon and eyewitness Niccolò Barbaro described one such attack in his diary, recording the determination of the Janissaries to retrieve the bodies of their fallen comrades, even under heavy Byzantine fire:

"They found the Turks coming right up under the walls and seeking battle, particularly the Janissaries ... and when one or two of them were killed, at once more Turks came and took away the dead ones ... without caring how near they came to the city walls. Our men shot at them with guns and crossbows, aiming at the Turk who was carrying away his dead countryman, and both of them would fall to the ground dead, and then there came other Turks and took them away, none fearing death, but being willing to let ten of themselves be killed rather than suffer the shame of leaving a single Turkish corpse by the walls."

• Ottoman Mining Operations: From approximately mid-May until 25 May, Ottoman engineers and miners attempted to destroy sections of the walls by digging underground tunnels. Many of the miners were Serbian workers from Novo Brdo, operating under the command of Zağanos Pasha. The defenders, assisted by the Genoese engineer Johannes Grant, constructed counter-tunnels and intercepted the Ottoman mining operations. Tunnels were discovered on 16, 21, 23 and 25 May and destroyed through counter-mining, combat and the use of Greek fire.

• Mehmed's Offer of Surrender: On 21 May, Mehmed sent an ambassador to Constantinople with terms for surrender. He offered to lift the siege if the city was handed over. Constantine XI and the inhabitants would be permitted to leave with their possessions, and the emperor would receive authority over the Peloponnese. Mehmed also promised protection for those who chose to remain in the city.

• Constantine XI Rejects Surrender: Constantine refused to surrender Constantinople. He was willing to negotiate higher tribute and recognize Ottoman territorial gains, but would not abandon the imperial capital. According to the account quoted in the Wikipedia article, his response was:

"As to surrendering the city to you, it is not for me to decide or for anyone else of its citizens; for all of us have reached the mutual decision to die of our own free will, without any regard for our lives."

• The Ottoman War Council: Mehmed consulted his senior commanders before deciding on the final assault. Grand Vizier Çandarlı Halil Pasha advised abandoning the siege, while Zağanos Pasha supported continuing the campaign and launching an immediate attack. Mehmed rejected withdrawal and ordered preparations for a general offensive.

Final Assault — 29 May 1453

Preparations for the final assault began on the evening of 26 May and continued into 27 May. Ottoman commanders spent approximately 36 hours mobilizing troops and organizing the offensive. On 28 May, soldiers were given time for prayer and rest before the attack.

• The Last Venetian Fleet: On 27 May, a Venetian fleet of 12 ships reached Constantinople after searching the Aegean Sea. It reported that no major Venetian relief fleet was coming to assist the city.

• Final Religious Ceremonies: On 28 May, religious processions took place throughout Constantinople. That evening, Emperor Constantine XI, Byzantine officials and representatives of both the Greek and Latin churches attended the final Vespers ceremony at Hagia Sophia.

• Ottoman Artillery Before the Assault: By this stage, Ottoman cannons had reportedly fired approximately 5,000 shots, using around 55,000 pounds of gunpowder. Ottoman criers and military horns announced the coming attack and prepared the troops for the offensive.

• First Ottoman Waves: Shortly after midnight on 29 May 1453, the Ottoman assault began. Christian troops serving in the Ottoman army attacked first, followed by successive waves of irregular azaps and Anatolian Turkmen forces. Their main target was the damaged north-western section of the Blachernae walls, which included older fortifications dating from the 11th century.

• Breach in the Blachernae Walls: Ottoman Turkmen troops managed to enter through a damaged section of the walls but were initially driven back by Byzantine defenders. The Ottoman assault continued with successive attacks, culminating in the deployment of the elite Janissaries.

• Wounding of Giovanni Giustiniani: During the Janissary assault, the Genoese commander Giovanni Giustiniani Longo, who directed the defense of the land walls, was seriously wounded. His removal from the defensive position caused confusion among the defenders and weakened their coordination.

• Ottoman Entry into the City: After Giustiniani's withdrawal, his Genoese troops retreated towards the city and harbor. Constantine XI and the remaining defenders continued fighting, but Ottoman troops entered through several points along the walls. Janissaries, including troops associated with Ulubatlı Hasan, advanced into the city.

• Collapse of the Defence: Some Greek defenders left their positions to protect their families. Venetian troops withdrew towards their ships, while some Genoese escaped to Galata. Other defenders were killed or captured. The Ottoman forces gained control of the city's defensive positions and continued advancing into Constantinople.

• Fate of Constantine XI: The final fate of Emperor Constantine XI remains uncertain. Later accounts describe him fighting and dying during the final resistance, while the Venetian eyewitness Niccolò Barbaro reported that he hanged himself near the San Romano Gate. No conclusive evidence establishes the exact circumstances of his death.

• Capture of the Golden Horn and Hagia Sophia: Ottoman troops secured the Golden Horn walls, while Venetian, Genoese and imperial ships escaped through the harbor before the Ottoman fleet took control of it around midday. Ottoman forces advanced towards the Augusteum, the square in front of Hagia Sophia. Civilians who had gathered inside the church were captured after its doors were breached.

• Final Resistance: Catalan troops continued defending their assigned section of the walls after other defensive positions had fallen. Their resistance ended as Ottoman forces consolidated control of the city.

From Byzantine Capital to Ottoman Imperial City 

The capture of Constantinople on 29 May 1453 ended the Byzantine Empire, which had continued the political and imperial traditions of the Eastern Roman Empire. Constantine XI died without an heir, bringing the Palaiologan imperial rule in Constantinople to an end.

Fausto Zonaro’s painting portrays Sultan Mehmed II entering Constantinople following the Ottoman conquest on 29 May 1453.

• Mehmed's Order to Restore Order: According to the Byzantine historian George Sphrantzes, Mehmed issued a proclamation on the third day after the conquest, allowing inhabitants who had escaped capture to leave their hiding places. He also declared that people who had abandoned their homes before the siege could return and recover their property, subject to the conditions stated in his proclamation.

• Captives and Human Losses: Estimates of the number of people enslaved or sold after the conquest vary. One figure cited in the Wikipedia article is approximately 30,000 people. David Nicolle's estimate, also cited there, records around 4,000 Greek deaths and more than 500 Venetian civilian deaths. These figures should not be treated as a complete or universally agreed casualty total.

• Conversion of Hagia Sophia: Mehmed II ordered Hagia Sophia to be converted into a mosque. A muezzin was instructed to call for prayer from the building. The Greek Orthodox Church was permitted to continue functioning, and Gennadius Scholarius was appointed Patriarch of Constantinople.

• Reorganization of the Orthodox Church: Gennadius Scholarius became the leading religious authority for the Orthodox Christian community under Ottoman rule. The later Ottoman millet system should not be projected onto this moment as a fully established institution; historians consider claims that it originated immediately after the conquest to be inaccurate.

• Constantinople Becomes the Ottoman Capital: Mehmed II made Constantinople the principal capital of the Ottoman Empire, replacing Edirne. The city became the center of Ottoman imperial administration and political authority.

• Mehmed's Claim to Roman Imperial Succession: Mehmed adopted the title Kayser-i Rûm, meaning “Caesar of the Romans.” Through this title, he presented himself as the successor to the Roman emperors who had ruled from Constantinople.

• Fall of the Morea: The Byzantine territories in the Peloponnese remained under the rule of Constantine's brothers, Thomas and Demetrios, until Ottoman forces conquered the Morea in 1460.

• Fall of Trebizond: The independent Empire of Trebizond, a Byzantine successor state on the Black Sea coast, was conquered by Mehmed II in 1461.

• Greek Scholars and the Renaissance: Following the conquest, some Greek scholars and intellectuals left Constantinople and settled in Italian cities and other parts of Western Europe. They carried Greek manuscripts, classical texts and knowledge of Byzantine scholarship with them. Their migration contributed to the wider transmission and study of Greek and Roman literature in Renaissance Europe.

• Reaction in Western Europe: The fall of Constantinople caused widespread concern among European rulers and church leaders. Pope Pius II advocated another crusade against the Ottomans, while other thinkers, including Nicholas of Cusa, supported dialogue with the new regional power. However, no major European military coalition succeeded in reconquering the city.

References: The Fall of Constantinople (Wikipedia); Steven Runciman, The Fall of Constantinople 1453; Marios Philippides and Walter K. Hanak, The Siege and the Fall of Constantinople in 1453; David Nicolle, Constantinople 1453: The End of Byzantium.

7. Expansion into Europe, Asia, and Africa

After the conquest of Constantinople, Ottoman rulers continued expanding their territories through warfare, diplomacy, alliances, and the incorporation of regional elites. The empire developed into a transcontinental power whose influence stretched from southeastern Europe to the Arab provinces and from the Black Sea region to North Africa. 

The Ottoman Empire at its greatest extent, showing its territories across three continents during the height of its expansion.

Different sultans pursued different priorities: some focused on the Balkans and Hungary, others on Anatolia, Iran, Syria, Egypt, or maritime competition in the Mediterranean and Red Sea. Expansion brought new revenue, trade routes, cities, and populations under Ottoman rule, but it also created longer frontiers and increasingly expensive military commitments. 

Ottoman power was never unlimited; rival states such as the Habsburg monarchy, Safavid Iran, Venice, and later Russia challenged its ambitions. Nevertheless, the fifteenth and sixteenth centuries transformed the Ottoman dynasty into one of the principal powers of the early modern world.

Expansion in the Balkans and Europe

• Serbia: Ottoman campaigns culminated in the conquest of the Serbian Despotate in 1459, although the region’s political and military history remained complex.

• Bosnia: The Ottoman conquest of much of Bosnia was consolidated in the fifteenth century, including the capture of the Bosnian kingdom in 1463.

• Hungary: The victory at Mohács in 1526 opened the way for Ottoman dominance over much of central Hungary.

• Belgrade: Captured by Suleiman in 1521, the city became an important Ottoman stronghold on the Danube.

• Vienna: Ottoman forces besieged the Habsburg capital in 1529 but failed to capture it.

Ottoman expansion in Europe involved more than battles. The empire established provincial administrations, collected taxes, negotiated with local elites, and incorporated some regional rulers into its political and military structures.

Expansion in Anatolia and the Eastern Frontier

Ottoman rulers also sought control over Anatolia and the routes linking it to Iran and Iraq.

• Rival Turkish Principalities: The Ottomans gradually absorbed or subordinated competing beyliks.

• Safavid Iran: The rise of the Safavid dynasty created a powerful rival on the eastern frontier.

• Battle of Chaldiran, 1514: Sultan Selim I defeated Safavid ruler Shah Ismail I, strengthening Ottoman influence in eastern Anatolia.

• Iraq and Mesopotamia: Ottoman campaigns under Suleiman brought Baghdad under Ottoman control in 1534, although the region remained contested in later wars.

The Ottoman–Safavid rivalry combined territorial competition with religious and political differences. The Safavid rulers promoted Twelver Shiism, while the Ottoman sultans governed a predominantly Sunni Muslim empire. These distinctions influenced political propaganda and policy, but the conflict also concerned control of land, trade routes, and regional authority.

Expansion into Syria, Egypt, and the Arab provinces

A major turning point came under Selim I, who ruled from 1512 to 1520.

• Battle of Marj Dabiq, 1516: Ottoman forces defeated the Mamluk army in Syria.

• Battle of Ridaniya, 1517: The Ottomans defeated the Mamluks near Cairo and brought Egypt under their control.

• Syria and Egypt: These wealthy regions expanded the empire’s tax base and strengthened its position in eastern Mediterranean trade.

• The Hijaz: Ottoman influence extended over the holy cities of Mecca and Medina through the existing sharifian political structure.

• Red Sea and Indian Ocean: The empire became more deeply involved in protecting pilgrimage routes and competing with Portuguese maritime power.

The conquest of Egypt was particularly important because it gave the Ottomans access to substantial agricultural revenue and strengthened their influence over routes connecting the Mediterranean with the Red Sea and Indian Ocean.

Ottoman Power in North Africa

Ottoman influence expanded across parts of North Africa during the sixteenth century, though the process varied by region.

• Algiers: Ottoman-linked rulers and naval forces established a significant presence along the North African coast.

• Tripoli: Ottoman forces captured Tripoli in 1551.

• Tunis: Control changed during conflicts involving Ottoman forces and their European rivals; Ottoman authority was established in the region in the sixteenth century but faced continued challenges.

• Mediterranean Rivalry: Ottoman fleets and corsairs contested maritime power with Spain, the Habsburgs, Venice, and other opponents.

Not every territory was governed in the same way. Some provinces were administered directly, while other North African regions retained substantial local autonomy under rulers connected to the Ottoman political order.

The limits of expansion

The empire’s territorial growth brought prestige and resources, but every new conquest required garrisons, officials, supply routes, and continuing military investment. The Ottoman government had to defend long borders in Europe and Asia while maintaining naval strength in the Mediterranean and Red Sea.

By the later sixteenth century, wars against the Habsburgs and Safavids became prolonged and costly. The empire remained powerful, but the balance increasingly shifted from rapid conquest toward the more difficult task of defending and administering what had already been acquired.

8. The Ottoman Empire’s Greatest Wars and Conquests

The Ottoman Empire’s rise was shaped by a succession of major wars that changed the political map of Europe, Asia, and North Africa. Ottoman victories brought new territories, revenue, strategic routes, and prestige, while defeats exposed the limits of imperial power. 

Some conflicts were fought against Christian European coalitions, others against Muslim rival states, and many involved shifting alliances rather than a simple division between religious communities. The empire relied on disciplined infantry, cavalry, artillery, naval forces, diplomacy, and the ability to mobilize resources over great distances. 

Yet geography, supply problems, disease, weather, and political instability could undermine even large armies. The following conflicts illustrate how Ottoman power expanded, how its rivals responded, and why military success did not always produce permanent political control.

WHISPERS OF TIME · MILITARY HISTORY

Major Battles & Conflicts

Six centuries of Ottoman warfare, territorial expansion, and imperial decline.

1371 · BATTLE

Battle of Maritsa

Opponents: Ottoman Empire vs Serbian forces

Ottoman victory weakened Serbian regional powers and accelerated Ottoman expansion into the Balkans.

Ottoman victory

1389 · BATTLE

Battle of Kosovo

Opponents: Ottoman Empire vs Serbian-led coalition

Sultan Murad I and Prince Lazar died. Ottoman influence in Serbia increased, although the battle's immediate outcome remains debated.

Outcome disputed

1396 · BATTLE

Battle of Nicopolis

Opponents: Ottoman Empire vs European Crusader coalition

Bayezid I defeated a major Crusader army, strengthening Ottoman control in the Balkans.

Ottoman victory

1402 · BATTLE

Battle of Ankara

Opponents: Ottoman Empire vs Timurid Empire

Timur defeated and captured Bayezid I. The defeat triggered the Ottoman Interregnum (1402–1413), a succession struggle among Bayezid's sons.

Ottoman defeat

1444 · BATTLE

Battle of Varna

Opponents: Ottoman Empire vs Hungarian-Polish-led Crusader army

Sultan Murad II defeated the Crusader coalition, securing Ottoman influence in southeastern Europe.

Ottoman victory

1453 · CONQUEST

Conquest of Constantinople

Opponents: Ottoman Empire vs Byzantine Empire

Mehmed II captured Constantinople, ending the Byzantine Empire and making the city the Ottoman capital.

Ottoman victory

1514 · BATTLE

Battle of Chaldiran

Opponents: Ottoman Empire vs Safavid Empire

Selim I defeated Shah Ismail I, establishing Ottoman dominance in eastern Anatolia and checking Safavid expansion westward.

Ottoman victory

1522 · SIEGE

Siege of Rhodes

Opponents: Ottoman Empire vs Knights Hospitaller

Suleiman the Magnificent captured Rhodes, strengthening Ottoman control over important eastern Mediterranean routes.

Ottoman victory

1526 · BATTLE

Battle of Mohács

Opponents: Ottoman Empire vs Kingdom of Hungary

Suleiman defeated the Hungarian army. King Louis II died, and Hungary entered a prolonged period of political division and Ottoman-Habsburg rivalry.

Ottoman victory

1529 · SIEGE

First Siege of Vienna

Opponents: Ottoman Empire vs Habsburg Monarchy

The Ottoman siege failed, marking a major limit to Ottoman expansion into Central Europe.

Ottoman failure

1538 · NAVAL BATTLE

Battle of Preveza

Opponents: Ottoman fleet vs Holy League fleet

Ottoman naval forces under Hayreddin Barbarossa won a major Mediterranean victory, strengthening Ottoman naval influence.

Ottoman victory

1570–1571 · CAMPAIGN

Ottoman Conquest of Cyprus

Opponents: Ottoman Empire vs Republic of Venice

The Ottomans conquered Cyprus, intensifying conflict with Venice and the Holy League.

Ottoman conquest

1571 · NAVAL BATTLE

Battle of Lepanto

Opponents: Ottoman fleet vs Holy League

The Ottoman navy suffered a major defeat, although the empire rebuilt its fleet and retained substantial naval power.

Ottoman defeat

1593–1606 · WAR

Long Turkish War

Opponents: Ottoman Empire vs Habsburg Monarchy and allies

A prolonged conflict that exhausted resources and ended with the Peace of Zsitvatorok in 1606.

Mixed results

1683 · SIEGE

Second Siege of Vienna

Opponents: Ottoman Empire vs Habsburg and allied forces

The Ottoman siege failed, followed by a major European counteroffensive.

Ottoman defeat

1683–1699 · WAR

Great Turkish War

Opponents: Ottoman Empire vs Holy League

Ottoman forces lost substantial European territories. The conflict ended with the Treaty of Karlowitz in 1699.

Major territorial losses

1768–1774 · WAR

Russo-Turkish War

Opponents: Ottoman Empire vs Russian Empire

Russia defeated the Ottomans. The Treaty of Küçük Kaynarca weakened Ottoman influence in the Black Sea region.

Ottoman defeat

1821–1829 · WAR OF INDEPENDENCE

Greek War of Independence

Opponents: Ottoman Empire vs Greek revolutionaries and their supporters

Greece secured independence following years of rebellion and foreign intervention.

Greek independence

1877–1878 · WAR

Russo-Turkish War

Opponents: Ottoman Empire vs Russian Empire

Ottoman defeat resulted in major territorial losses and increased Russian influence in the Balkans.

Ottoman defeat

1912–1913 · WAR

Balkan Wars

Opponents: Ottoman Empire vs Balkan League states

The Ottomans lost nearly all their remaining European territories, apart from a small area around eastern Thrace.

Major territorial losses

1914–1918 · WORLD WAR I

First World War

Opponents: Ottoman Empire vs Allied Powers

Ottoman defeat, the Armistice of Mudros, Allied occupation, and the eventual dissolution of the empire followed.

Central Powers defeat

1915–1916 · WORLD WAR I CAMPAIGN

Gallipoli Campaign

Opponents: Ottoman Empire vs British and French-led Allied forces

Ottoman forces successfully defended the Gallipoli Peninsula, preventing the Allies from capturing the Dardanelles.

Ottoman defensive victory

Historical Significance

Ottoman military history was not a continuous sequence of victories. The conquest of Constantinople, victories at Mohács and Nicopolis, and the defense of Gallipoli demonstrated the empire's military capabilities. 

However, defeats at Ankara and Vienna, territorial losses against Russia, and the Balkan Wars exposed growing military, political, and economic difficulties. The First World War ultimately brought the Ottoman Empire to its end.

WHISPERS OF TIME · OTTOMAN HISTORY

Dates and outcomes of some early conflicts are debated. This selection highlights major events rather than every Ottoman military campaign.

Historical Significance

The Ottoman wars changed the boundaries and political relationships of several regions. The conquest of Constantinople reshaped the eastern Mediterranean; the campaigns against the Mamluks brought Syria and Egypt into the empire; the wars in Hungary transformed central European politics; and the Ottoman–Safavid rivalry helped shape the long-term political geography of the Middle East.

These conflicts also demonstrate that the empire’s power was neither constant nor unlimited. Its success depended on military organization, leadership, finances, diplomacy, and the circumstances of each campaign. Understanding those factors is essential to understanding the empire’s later transformation and eventual dissolution.

9. The Golden Age — Suleiman the Magnificent

The reign of Suleiman I, commonly known in Europe as Suleiman the Magnificent and in Ottoman tradition as Kanuni, or “the Lawgiver,” marked one of the most influential periods in Ottoman history. Ruling from 1520 to 1566, he presided over an empire that stretched across southeastern Europe, western Asia, and North Africa. 

Ottoman armies campaigned against the Habsburg monarchy in central Europe, fought the Safavid Empire in the east, and competed for control of the Mediterranean. At the same time, the imperial government developed its legal and administrative institutions, while architecture, literature, calligraphy, and court culture flourished. 

The empire’s achievements during this period depended not on Suleiman alone, but also on experienced officials, military commanders, scholars, artisans, and provincial administrators. His reign is often described as a golden age, although it also involved costly wars, executions, political rivalries, and the hardships associated with imperial expansion.

Portrait of Suleiman the Magnificent, attributed to the circle of Italian painter Titian and dating to after 1543. Suleiman ruled the Ottoman Empire from 1520 to 1566, during its height of political and territorial power.

Suleiman’s Rise to Power

Suleiman became sultan in 1520 after the death of his father, Selim I, who had greatly expanded Ottoman territory by conquering Syria and Egypt.

• Reign: 1520–1566.

• Dynasty: Ottoman.

• Principal Capital: Constantinople, increasingly known in Ottoman usage as Istanbul.

• Major Rivals: The Habsburg monarchy, Safavid Iran, and various European maritime powers.

• Main Priorities: Territorial expansion, dynastic security, administration, law, and imperial prestige.

Suleiman inherited a powerful state with substantial financial and military resources. He used these advantages to expand Ottoman influence, but his campaigns also required sustained taxation, military mobilization, and complex diplomacy.

Major Military Campaigns

Belgrade — 1521

Suleiman captured Belgrade, a strategically important fortress on the Danube. Its position made it valuable for future Ottoman operations into Hungary and central Europe.

Rhodes — 1522

Ottoman forces captured Rhodes after a lengthy siege, ending the rule of the Knights Hospitaller on the island. The conquest strengthened Ottoman influence over important eastern Mediterranean routes.

Mohács — 1526

The Ottoman victory over Hungary at Mohács resulted in the death of King Louis II and created a succession crisis. Hungary subsequently became divided among Ottoman-controlled territories, Habsburg-held areas, and the Ottoman-supported Kingdom of Eastern Hungary, whose political arrangements evolved over time.

Vienna — 1529

Suleiman’s army besieged Vienna but failed to capture it. The campaign demonstrated the limits of Ottoman expansion into central Europe, particularly when distance, supply, fortifications, and weather complicated military operations.

The Eastern Frontier

Suleiman also fought the Safavid Empire. Ottoman forces captured Baghdad in 1534, strengthening Ottoman control in Iraq. The frontier remained contested, and the two empires continued fighting over territory and influence.

Suleiman as Lawgiver

Suleiman’s Ottoman title, Kanuni, reflects his association with the organization and application of imperial law.

The Ottoman legal system combined Islamic jurisprudence, known as sharia, with sultanic regulations, known as kanun. These regulations addressed matters such as taxation, landholding, administration, and criminal penalties.

• Imperial Administration: Regulations helped standardize aspects of governance across the empire.

• Taxation: Officials administered different forms of taxation according to legal status, occupation, land, and region.

• Provincial Government: Governors and other officials carried out imperial policies, although local conditions varied.

• Judges: Ottoman courts operated through a system involving trained judges, legal scholarship, and imperial regulations.

Suleiman did not create a completely uniform legal system. Ottoman governance continued to accommodate different communities, regional customs, and established institutions.

Architecture and The Arts

The sixteenth century witnessed major achievements in Ottoman architecture and artistic production.

• Mimar Sinan: The celebrated imperial architect designed major mosques, bridges, schools, and other public buildings.

• Süleymaniye Mosque: Built in Istanbul during Suleiman’s reign, the complex included religious and educational institutions.

• Literature: Ottoman Turkish poetry and court literature developed under the patronage of rulers and wealthy officials.

• Calligraphy: Skilled calligraphers produced religious manuscripts, inscriptions, and works for the imperial court.

• Ceramics and Textiles: Ottoman workshops developed distinctive artistic traditions, including elaborate ceramic decoration and luxury fabrics.

These achievements depended on skilled workers and established institutions, not simply the personal taste of the sultan.

Hürrem Sultan and Imperial Politics

La Sultana Rossa, a painting attributed to Titian and traditionally identified as depicting Hürrem Sultan, the influential wife of Suleiman the Magnificent, c. 1550.

Hürrem Sultan, known in many European accounts as Roxelana, became one of the most influential women at the Ottoman court. She entered the imperial household, became Suleiman’s wife, and exercised influence through patronage and her position within the dynasty.

Her public charitable foundations included religious and social institutions. Like other members of the imperial family, she used patronage to establish a lasting presence in the empire’s religious and urban landscape.

Court politics could be intense, especially where succession was concerned. The interests of the sultan’s sons, their mothers, senior officials, and military factions sometimes conflicted. However, stories portraying every palace decision as the result of a single conspiracy should be treated cautiously unless supported by reliable evidence.

The Later Years of Suleiman’s Reign

Suleiman continued campaigning in his later years, despite the growing demands of governing a large empire. He died in 1566 during the campaign against the Habsburg-held fortress of Szigetvár in Hungary.

His son Selim II succeeded him. Suleiman left behind an empire with enormous territorial reach and influential administrative and cultural institutions. His reign became a lasting reference point in Ottoman political memory, although later centuries presented different challenges that could not be solved simply by returning to the conditions of the sixteenth century.

10. Life, Culture, and Society in the Ottoman Empire

The Ottoman Empire governed people with different languages, religions, occupations, and regional traditions. Life in an imperial capital such as Istanbul differed considerably from life in a Balkan village, an Anatolian farming settlement, an Arab provincial city, or a North African port. 

Society included sultans and officials, soldiers and scholars, merchants and craftspeople, farmers and laborer's, as well as enslaved people whose experiences varied according to their circumstances. Religion influenced law, education, charitable activity, and community organization, but local customs and economic conditions also shaped daily life. 

Trade routes connected distant provinces, while markets, workshops, mosques, churches, synagogues, schools, and public baths formed important parts of urban life. Ottoman society changed substantially over the empire’s long history, so no single description applies equally to every century or region.

The Social Structure

Ottoman society contained overlapping legal, economic, religious, and administrative groups.

• The Ruling Household: The sultan, members of the dynasty, and the imperial household occupied the highest levels of political authority.

• Officials and Military Personnel: Administrators, judges, soldiers, and other state servants carried out imperial functions.

• Religious Scholars: Muslim scholars and judges played important roles in education, legal interpretation, and religious institutions.

• Merchants and Craftspeople: Urban businesses supplied local markets and participated in regional and international trade.

• Farmers and Rural Communities: Agricultural production supported households, towns, military forces, and state revenue.

• Religious Minorities: Christians and Jews maintained religious institutions and community traditions under Ottoman rule, though their legal position and lived experiences varied.

This was not a rigid social system in which every person’s status remained fixed. Wealth, military service, education, patronage, regional conditions, and political circumstances could affect an individual’s opportunities.

Religion and Community Life

The empire’s population included Sunni Muslims, various Christian communities, Jews, and other religious groups.

Muslim institutions included mosques, religious schools, charitable foundations, and courts. Christian and Jewish communities maintained churches, monasteries, synagogues, schools, and communal organizations under differing legal and political arrangements.

The Ottoman government often recognized religious communities and allowed certain internal affairs to be managed by their own institutions. This arrangement is frequently discussed through the concept of the millet system, although the system’s organization changed over time and should not be imagined as one uniform structure that existed unchanged throughout Ottoman history.

Religious coexistence did not mean equality in the modern legal sense. Non-Muslims could face different taxes, restrictions, and legal conditions, and the treatment of communities varied across periods and places. There were also episodes of coercion, persecution, and violence.

Markets, Trade, and Crafts

Markets were central to Ottoman economic and social life. Large cities contained specialized streets and market areas where merchants and artisans sold food, clothing, metalwork, ceramics, textiles, and other goods.

• Agriculture: Grain, livestock, fruit, olives, cotton, and other products supported regional economies.

• Textiles: Wool, silk, cotton, carpets, and other fabrics circulated through domestic and international markets.

• Trade Routes: Ottoman territories connected Mediterranean commerce with the Balkans, Anatolia, the Middle East, and North Africa.

• Craft Guilds: In many towns, craft workers operated through associations that regulated aspects of training, quality, prices, and professional conduct, although arrangements differed by place and period.

• Markets and Taxation: The government collected revenue through various taxes, customs duties, and other levies.

Ottoman commercial life was connected to wider global developments. European maritime expansion, changing trade patterns, warfare, and the growth of new financial networks gradually affected the empire’s economic position.

Food and Everyday Life

Diet varied by region, income, religion, and season. Bread and grains were important staples in many communities, alongside vegetables, fruit, dairy products, meat, fish, and legumes where available.

Coffee became an important social and commercial drink in Ottoman cities during the sixteenth century. Coffeehouses developed into places where people could meet, discuss news, listen to storytelling, play games, and socialize. Authorities sometimes viewed these gathering places with suspicion because public discussion could become politically sensitive.

Public baths, known as hamams, served hygienic and social functions in many towns and cities. Their availability and use differed according to local resources and social circumstances.

Education and Scholarship

Education was provided through a variety of institutions.

• Religious Schools: Madrasas taught Islamic subjects and, depending on the institution, other scholarly disciplines.

• Elementary Education: Children could receive basic instruction through local schools and religious institutions, though access was unequal.

• Palace Education: Selected students and servants received training for service within the imperial household and administration.

• Literary Culture: Scholars, poets, historians, and calligraphers worked under private, religious, and imperial patronage.

• Libraries and Manuscripts: Books and manuscripts circulated through scholarly networks, religious foundations, and private collections.

Educational opportunities were not universal. Access varied according to wealth, location, gender, occupation, and community.

Women in Ottoman Society

Women’s lives differed widely according to class, region, religion, and historical period. Most women had responsibilities within households and families, while some also participated in agriculture, commerce, crafts, and property management.

Ottoman legal records document women owning property, inheriting wealth, bringing cases to court, and engaging in financial transactions. Such rights did not mean women enjoyed modern political equality or that all women had equal practical access to the courts.

Women of the imperial household could exercise considerable influence through dynastic relationships, patronage, and charitable foundations. Outside the palace, women’s opportunities were shaped more directly by household resources, community customs, local law, and economic conditions.

11. The Sultans, Harem, and Palace Politics

The Ottoman palace was both a royal residence and a center of government. The sultan’s authority connected military command, administration, diplomacy, justice, and dynastic succession. Palace life involved officials, servants, scholars, guards, advisers, and members of the ruling family, all operating within a complex hierarchy. 

The imperial harem was part of this household and was associated with the sultan’s family, private living quarters, and the upbringing of selected members of the dynasty. It was not simply a place of romantic intrigue, as popular stories often suggest. 

Women of the imperial household could become influential through family relationships, charitable patronage, and their roles in succession politics. At the same time, the palace was a competitive political environment in which access to the ruler and the future of the dynasty could carry enormous consequences.

The Sultan’s Authority

The sultan stood at the center of the Ottoman political system, but he did not personally administer every part of the empire.

• Grand Vizier: The leading minister often coordinated government affairs and could exercise extensive authority on the sultan’s behalf.

• Imperial Council: The Divan-ı Hümayun served as an important forum for administration, petitions, diplomacy, and state business.

• Provincial Governors: Officials governed provinces, collected revenue, and supervised local administration.

• Judges: Courts handled legal matters under Islamic jurisprudence and imperial regulations.

• Military Commanders: Commanders organized campaigns and maintained military forces under the sultan’s authority.

The actual balance of power varied. Some sultans governed actively, while others relied heavily on ministers, relatives, or senior officials. Strong ministers could shape policy, but their positions depended on political relationships and the ruler’s support.

The imperial Harem

The word harem refers to a protected or private household space. In the Ottoman imperial context, it included the sultan’s family and a structured household staffed by women and eunuchs.

The harem was not identical to the entire Ottoman system of concubinage, and its membership and organization changed over time.

• Valide Sultan: The mother of a reigning sultan could hold an influential position within the imperial household.

• Haseki Sultan: This title was associated with a favored consort of the sultan during certain periods, notably the sixteenth and seventeenth centuries.

• Dynastic Mothers: Mothers of princes could have political and household responsibilities linked to their sons’ futures.

• Household Staff: Women and eunuchs performed administrative, educational, domestic, and supervisory roles.

• Patronage: Some prominent women sponsored mosques, schools, hospitals, waterworks, and charitable foundations.

Not every woman in the imperial household held power. Status, access, family relationships, and the changing political circumstances of each reign shaped individual influence.

Hürrem Sultan

Hürrem Sultan became one of the best-known women in Ottoman history through her relationship with Suleiman the Magnificent. She was the mother of several of his children and became his wife, an unusual development in the context of earlier Ottoman dynastic practice.

Her influence extended beyond the household. She sponsored charitable projects, including a major complex in Jerusalem and institutions in Istanbul. Her correspondence and patronage demonstrate that she participated in the political and diplomatic culture of the court.

Later accounts often present Hürrem as the central figure in every palace rivalry of her time. Such portrayals can oversimplify complex events. The political decisions of Suleiman’s reign involved numerous officials, dynastic interests, and military considerations.

The Valide Sultan and the Influence of Royal Women

The mother of the reigning sultan could occupy a prominent position, particularly when her son was young or depended on senior advisers.

Royal women sometimes influenced appointments, diplomatic relationships, charitable spending, and court access. Their patronage also shaped urban landscapes through religious and public buildings.

This influence was not a separate, formal government that replaced the sultan. Rather, it operated through household authority, family connections, political alliances, and personal access to the ruling household.

Palace Rivalries and Political Intrigue

The palace brought together people whose interests could conflict. Officials competed for appointments, royal mothers sought security for their children, and princes represented possible futures for the dynasty.

Political rivalries could result in dismissals, imprisonment, exile, or execution. However, not every change of office or dynastic death was the result of a secret palace conspiracy. Historians compare chronicles, administrative records, correspondence, and other evidence to assess specific claims.

The Transition Toward Seniority

Early Ottoman succession did not operate under a simple rule that automatically passed the throne to the eldest son. Several male members of the dynasty could claim the throne, and succession disputes sometimes led to civil war.

Over time, the empire increasingly favored the senior eligible male member of the dynasty rather than the reigning sultan’s eldest son. Princes were often kept within the palace under a system associated with the kafes, or “cage,” although the arrangements varied.

This change reduced some risks of open succession warfare but created other challenges. Princes who spent long periods isolated from government and military command could arrive on the throne with limited practical experience.

12. The Throne of Blood — Fratricide, Succession Struggles, and Civil Wars

Succession was one of the most dangerous problems in Ottoman dynastic history. Unlike systems in which a single established inheritance rule settled every claim, early Ottoman succession allowed competing princes to pursue the throne. This could produce civil wars that divided armies, provinces, and political elites. 

Once a new sultan secured power, he faced another challenge: preventing rivals from using the same methods against him. Some rulers ordered the execution of male relatives whom they regarded as threats to dynastic stability. Such killings became associated with Ottoman fratricide, but they did not occur in every reign and should not be confused with every form of political execution. 

Over time, succession practices changed, including the movement toward seniority within the dynasty and the confinement of princes in the palace. These arrangements reduced certain risks but also reflected the empire’s continuing struggle to balance political stability with the survival of the ruling house.

Why Succession was Dangerous

The Ottoman dynasty’s early expansion created a political system in which more than one prince could attract military and political support.

• Competing Claims: Princes could argue that their descent, political support, or military success justified their accession.

• Military Backing: Soldiers and commanders could influence the outcome by supporting particular candidates.

• Provincial Power: Princes appointed to govern regions could develop political networks and practical military experience.

• Foreign Intervention: Rival states sometimes supported Ottoman claimants to weaken the reigning sultan.

• Civil War: When competing princes refused to accept one another’s authority, the result could be a prolonged conflict.

The problem was not unique to the Ottomans. Dynastic states elsewhere also experienced succession wars, although the rules and practices differed.

The Bloody Succession: How Fratricide Became a Tradition

During the early Ottoman period, there was no fixed rule that the eldest son would automatically inherit the throne. Male members of the Ottoman dynasty could claim the sultanate, and succession often depended on military strength, political alliances and the ability to defeat rival princes. When a sultan died, his sons and brothers could compete for the throne, sometimes triggering prolonged civil wars.

• 1385 — The Revolt of Savcı Bey: Savcı Bey, son of Murad I, rebelled against his father after forming an alliance with Byzantine Prince Andronikos, son of Emperor John V Palaiologos. The rebellion was defeated, and Savcı Bey was captured and executed. His death demonstrated that the danger of succession struggles extended beyond brothers to include a sultan's own sons.

• 1389 — Bayezid I and the Execution of Yakub Çelebi: Following the death of Murad I during the Battle of Kosovo, his son Bayezid I was proclaimed sultan by the Ottoman commanders. His brother Yakub Çelebi, who had also commanded Ottoman troops during the battle, was subsequently summoned and executed. Some historical accounts suggest that senior Ottoman officials feared Yakub might challenge Bayezid's accession. This became a significant early example of a prince being killed not after a completed rebellion, but to prevent a possible succession conflict.

• 1402–1413 — The Ottoman Interregnum Sultan Mehmed I : After Bayezid I was defeated and captured by Timur at the Battle of Ankara on 28 July 1402, his sons fought for control of the remaining Ottoman territories. The principal contenders included Süleyman Çelebi, İsa Çelebi, Musa Çelebi and Mehmed Çelebi. Their struggle lasted approximately eleven years and involved battles, shifting alliances and foreign intervention.  Mehmed Çelebi eventually defeated Musa at the Battle of Çamurlu on 5 July 1413, becoming Sultan Mehmed I and reunifying the Ottoman state. Musa was wounded and tried to escape towards Wallachia, but Mehmed's commanders captured him. Musa was taken to Mehmed and strangled on his orders. 

• 1421–1451 — Murad II and the Mustafa Rebellions: During Murad II's reign, a prince known as Mustafa Çelebi, who claimed to be a son of Bayezid I, challenged the Ottoman throne. After being defeated and captured, he was hanged at Edirne in the winter of 1422, on Murad's orders. Murad also faced opposition from his younger brother, another Şehzade Mustafa, who rebelled against him and was eventually executed. He was handed over to Murad and executed by strangulation on 20 February 1423.

• 1513 Selim I and the Elimination of Şehzade Korkut: When Selim I took the throne from his father Bayezid II, he initially spared his brother Korkut, granting him provincial responsibilities. However, some Ottoman officials and soldiers later contacted Korkut and encouraged him to claim the sultanate. Korkut responded favorably and reportedly promised rewards to supporters.  On Selim's orders, Sinan Ağa, the chief gatekeeper, executed him by strangulation using a bowstring in 1513 near Eğrigöz (modern-day Emet, Turkey). His body was subsequently taken to Bursa and buried in the Orhan Gazi Tomb. Although Korkut's execution is historically established, whether he had genuinely plotted against Selim or had been framed through fabricated letters remains disputed.

• 1553 — Suleiman the Magnificent and the Execution of Şehzade Mustafa: Sultan Suleiman I ordered the execution of his eldest surviving son, Şehzade Mustafa, during the Ottoman campaign against the Safavids. Mustafa was accused of conspiring to overthrow his father. He was summoned to the imperial tent near Ereğli and strangled by executioners. His death caused widespread reactions among Ottoman soldiers and observers. Although this was not fratricide, it belongs in the history of dynastic executions because the same succession fears influenced the decision.

• 1559–1562 — Selim and Bayezid's War of Succession: Following the death of Hürrem Sultan in 1558, her sons Şehzade Selim and Şehzade Bayezid became the principal rivals for succession. Their dispute developed into armed conflict. Selim defeated Bayezid at the Battle of Konya in May 1559.  Bayezid fled to Safavid Persia with his sons and sought protection from Shah Tahmasp I. After negotiations between the Ottoman and Safavid courts, Bayezid and his sons were handed over to Ottoman executioners and killed in 1562. Selim remained the principal heir and eventually became Sultan Selim II in 1566.

• 1574 Murad III and the Execution of Five Brothers: Upon ascending the Ottoman throne in December 1574, Sultan Murad III ordered the execution of his five younger brothers to eliminate potential rivals to his rule. All five princes were strangled by bowstring, following the Ottoman practice of royal fratricide. Their coffins were reportedly carried alongside that of their father, Sultan Selim II, during his funeral procession in Constantinople. 

• 1595 — Mehmed III and the Execution of Nineteen Brothers: Upon ascending the Ottoman throne in January 1595, Sultan Mehmed III ordered the execution of his nineteen younger brothers to eliminate potential rivals to his authority.  All nineteen princes were strangled with silk handkerchiefs or cords, in accordance with the Ottoman practice of royal fratricide, rather than being beheaded. Contemporary Ottoman chroniclers Selânikî and Peçevi recorded the executions and the public grief that followed.  Some of the victims were still infants, and their deaths reportedly caused widespread mourning in Constantinople. There is no established evidence that the princes had rebelled or conspired against Mehmed; their execution was intended to secure his succession and prevent future dynastic conflicts. The execution of all nineteen brothers is an established historical fact, supported by contemporary accounts. Ref ( Ekrem Buğra Ekinci, “Fratricide in Ottoman Law” (2018))

• The Kafes System — Princes Confined Instead of Executed: Following the development of the Kafes system, several Ottoman princes were kept under guarded confinement inside the imperial palace rather than being executed. Mustafa I spent years confined during the reign of his brother Ahmed I before becoming sultan in 1617. Ibrahim I was similarly confined during Murad IV's reign before ascending the throne in 1640. Later, Suleiman II and Ahmed II also endured decades of palace confinement before becoming sultans in 1687 and 1691, respectively. These cases demonstrate the historical use of palace confinement as an alternative to eliminating potential rivals to the Ottoman throne.

• 1808 — The Final Dynastic Executions: In July 1808, when Alemdar Mustafa Pasha marched on Constantinople to restore the deposed Sultan Selim III to the Ottoman throne, Sultan Mustafa IV ordered the execution of both Selim III and his own brother, Şehzade Mahmud, fearing the loss of his crown.  Palace executioners strangled Selim III before Alemdar's forces could reach him. However, Mahmud managed to escape the palace and was subsequently proclaimed Sultan Mahmud II on 28 July 1808. Mustafa IV's order to eliminate his predecessor and his brother is an established historical fact, recorded in Ottoman historical accounts.

 

The Scale of Ottoman Fratricide

The Scale of Ottoman Fratricide

Historical estimates differ according to which dynastic executions are included. The following figures are attributed to Ottoman legal historian Ekrem Buğra Ekinci's study on fratricide.

Period	Princes Executed
14th century	5
15th century	5
16th century	44
17th century	5
18th century	1
Total	60

Historical note: These figures are attributed to Ekrem Buğra Ekinci's research. They should be treated as a scholarly estimate, not an uncontested total, because historians differ over which executions qualify as fratricide.

Source: Ekrem Buğra Ekinci, Fratricide in Ottoman Law, Belleten (2018).

Historical estimates differ because scholars classify executions differently, particularly when distinguishing actual rebellions from precautionary killings and executions of other relatives. A study by Ottoman legal historian Ekrem Buğra Ekinci, published in the Turkish Historical Society journal Belleten in 2018, reports a commonly cited estimate of approximately 60 Ottoman princes executed across several centuries. Its breakdown is:

The study classifies the cases according to actual rebellion, preparation for rebellion, and precautionary executions intended to prevent future disorder. Other historians provide higher totals because they use different definitions and include additional dynastic relatives.

References: Ekrem Buğra Ekinci, Fratricide in Ottoman Law, Belleten (2018); The Cambridge History of Islam; V. L. Ménage and Colin Imber, Ottoman Historical Documents: The Institutions of an Empire; Encyclopedia of Islam; The Ottoman Empire’s Life-or-Death Race, Smithsonian Magazine.

13. The Ottoman Military, Janissaries, and Warfare

The Ottoman Empire’s expansion depended heavily on its ability to organize soldiers, collect resources, build fortifications, and maintain supply routes across vast territories. Its military system evolved over centuries, adapting to changing weapons, battlefield tactics, and the demands of warfare against European, Asian, and Mediterranean rivals. 

Among its best-known forces were the Janissaries, an elite infantry corps that became closely associated with Ottoman imperial power. The army also included cavalry, provincial troops, artillery specialists, engineers, and forces recruited or supported by local rulers. Ottoman military success was never the result of one unit alone. 

It depended on coordination between the central government, provincial administrations, commanders, and the economic systems that supplied the army. Over time, however, changes in warfare and the growing political influence of military groups created serious challenges for the sultans. Reforming the military became one of the empire’s most important—and most difficult—tasks.

The Janissaries: The Sultan’s Elite Infantry

The Janissaries, known in Ottoman Turkish as Yeniçeri, meaning “new troops,” developed into one of the empire’s most important military institutions.

• Origins: The corps emerged during the early Ottoman period, becoming increasingly organized under the later medieval sultans.

• Recruitment: For centuries, many Janissaries were recruited through the devshirme system, under which selected Christian boys from certain provinces were taken, converted to Islam, and trained for state service.

• Training: Recruits received specialized instruction and were integrated into a disciplined military organization.

• Weapons: Janissaries became prominent users of firearms as gunpowder warfare developed.

• Imperial Service: They served in campaigns, garrisons, and other military duties connected to the sultan’s government.

The devshirme system was a form of compulsory recruitment and could involve the separation of children from their families. Although some recruits rose to powerful positions, that possibility does not remove the coercive nature of the system.

Janissary recruitment and organization changed over time. By later centuries, the corps increasingly admitted men through other routes, and its original structure was substantially altered.

Portraits illustrating different roles and ranks within the Ottoman military system, from the commander of the Janissary corps and a mounted sipahi archer to the head cook of a Janissary regiment.

Sipahi Cavalry and The Timar System

Ottoman armies also relied on cavalry, including sipahis who received revenue assignments in exchange for military service.

Under the timar system, certain officials and cavalrymen were assigned the right to collect revenue from designated lands. The land was not necessarily their private property; rather, the revenue supported their duties and equipment.

• Military Service: Timar holders were expected to provide cavalry service according to their obligations.

• Provincial Administration: The system connected local revenue collection with military mobilization.

• Regional Variation: Its operation differed across provinces and changed over the centuries.

• Long-term Transformation: The growth of cash taxation, changing military requirements, and administrative reforms gradually reduced the importance of the classical timar system.

Artillery and Gunpowder Warfare

Ottoman commanders made extensive use of artillery, particularly in sieges and major campaigns.

• Siege Warfare: Cannons helped attack fortified walls, although their effectiveness depended on ammunition, engineering, terrain, and the quality of the defenses.

• Constantinople, 1453: Mehmed II’s forces used heavy artillery during the siege, contributing to the eventual fall of the city.

• Field Artillery: Firearms and cannons increasingly shaped battlefield tactics across the early modern period.

• Engineering: Military campaigns required roads, bridges, fortifications, transport systems, and skilled technical personnel.

The Ottomans were not the only power using gunpowder weapons. Their rivals also developed artillery and firearms, and military technology spread through competition, trade, migration, and the movement of specialists.

The Military and the Empire’s Economy

Large campaigns required more than soldiers. The government needed to pay troops, provide food and ammunition, maintain animals, transport heavy equipment, and protect supply routes.

The financial demands of warfare affected taxation, provincial administration, and relations between the central government and local elites. Prolonged wars could place heavy pressure on the treasury, especially when several fronts required attention simultaneously.

As European armies developed new weapons, training methods, and administrative systems, Ottoman rulers increasingly faced the challenge of adapting their military institutions to a changing strategic environment.

• Agriculture — The Foundation of Imperial Revenue: Agriculture was the principal source of Ottoman state income for much of the empire's history. Taxes were collected on agricultural production, livestock and other rural activities across Anatolia, the Balkans, the Middle East and North Africa. The government maintained detailed land and population registers to assess taxable resources and organize revenue collection.

• The Timar System — Land Revenue for Military Service: From the fourteenth through the sixteenth centuries, the Ottoman state assigned the right to collect specified rural tax revenues to cavalrymen known as sipahis. These revenue assignments were called timars. The holders did not own the land itself; they received its tax income in return for maintaining military equipment and horses and providing cavalrymen for the sultan's campaigns. Larger revenue assignments required the holder to provide additional troops. The system supported provincial cavalry without requiring the central treasury to pay every soldier a regular salary.

• The Janissaries — A Growing Financial Commitment: Unlike many provincial sipahis, the Janissaries were professional infantry soldiers maintained through the central government's financial system. They received regular wages, equipment and provisions. As the army increasingly relied on infantry armed with firearms, the treasury had to collect more taxes in cash rather than relying mainly on locally assigned agricultural revenues. This transformation significantly increased the cost of maintaining the military.

• Military Expenditure — The Rising Cost of Warfare: The financial burden of the military increased substantially during the sixteenth and seventeenth centuries. Historian Linda T. Darling, in The Cambridge History of Turkey, reports that the number of people receiving salaries from the state increased from approximately 41,000 to 91,000 during the sixteenth century. Military wages accounted for approximately 77% of the Ottoman budget in 1630 and 62.5% in 1670. These figures illustrate the enormous pressure that military payrolls placed on imperial finances.

• Taxation and the Central Treasury: The Ottoman government collected revenue through agricultural taxes, customs duties, urban taxes, tribute from certain dependent territories and other levies. Under the timar system, much of the revenue was collected and spent locally by the holders of military assignments rather than entering the central treasury. As the need for cash increased, the government expanded other methods of revenue collection, including tax farming (iltizam), in which private individuals paid for the right to collect specified taxes.

• Trade and Customs Revenue: The empire occupied important commercial routes connecting Europe, Asia and the Mediterranean. Major commercial centers included Istanbul, Bursa, Aleppo, Cairo, Salonica and Smyrna (İzmir). Merchants traded in textiles, silk, spices, grain, coffee, metals and other commodities. Customs duties on imported and exported goods provided additional income to the state. Ottoman customs registers recorded information about ships, sailors, merchants, goods and prices, making them important evidence for the empire's commercial activity.

• Arsenals, Cannon Foundries and Military Production: The Ottoman state maintained workshops and production facilities for weapons, artillery, ammunition, ships and military equipment. The imperial arsenal in Istanbul, known as the Tersâne-i Âmire, became a major center of naval construction and maintenance. Cannon foundries and gunpowder facilities also supported the army's increasing reliance on firearms and artillery. These establishments required skilled workers, raw materials, transportation and continuous financial investment.

• The Navy and Maritime Trade: The Ottoman fleet protected commercial shipping, supported military campaigns and helped secure control over strategic waterways. Naval operations required ships, sailors, timber, rope, iron, sails, weapons and supplies. The conquest of important ports and coastal territories also brought customs revenue and access to maritime resources. However, maintaining a large fleet placed an additional burden on state finances, particularly during prolonged naval wars.

• Inflation and Currency Devaluation: During the sixteenth century, the Ottoman economy experienced significant price increases, part of the wider European and Mediterranean price revolution. Later currency devaluations further complicated the government's ability to pay soldiers and purchase military supplies. Since many military personnel received wages every three months, the treasury faced substantial cash requirements throughout the year, while many taxes were collected annually or in agricultural produce.

• Seventeenth-Century Financial Pressures: The increasing cost of warfare, the expansion of salaried infantry and difficulties in converting agricultural taxes into cash placed pressure on the central treasury. Provincial tax intermediaries and local elites also retained substantial portions of collected revenue. Research by Şevket Pamuk and K. Kıvanç Karaman explains that more than half of gross tax receipts could be retained by intermediaries in some seventeenth- and eighteenth-century arrangements, limiting the revenue reaching the central government.

• Nineteenth-Century Military Reforms: During the nineteenth century, the Ottoman government attempted to modernize its armed forces and strengthen central administration. The abolition of the Janissary corps by Sultan Mahmud II in 1826 was a major turning point. The state subsequently developed new military institutions, purchased modern weapons, established military schools and expanded the use of European-style training. These reforms required new taxes, loans and administrative changes, increasing the importance of centralized public finance.

The Janissaries and Political Power

The Janissaries gradually became more than a fighting force. Their influence within Istanbul and their relationship with the imperial government gave them a role in political struggles.

At various points, Janissary opposition contributed to the removal or overthrow of sultans and resistance to reforms that threatened established privileges. This influence was not constant. The corps changed substantially over time, and its political behavior depended on the circumstances of each reign.

The Destruction of the Janissaries — 1826

By the nineteenth century, Sultan Mahmud II regarded the Janissaries as a major obstacle to his military reforms. In 1826, after a confrontation known as the Auspicious Incident, government forces crushed the corps and abolished it.

The destruction of the Janissaries removed a powerful institution that had resisted attempts to reorganize the military. It also involved substantial violence and repression.

Mahmud II subsequently advanced new military structures modelled in part on contemporary European systems. These reforms were intended to strengthen the state against foreign rivals and internal challenges, but building a modern army required changes in training, finance, administration, and political authority.

Historical Significance: The Ottoman military was not simply an institution supported by the economy; it was one of the main forces shaping the empire's taxation, agriculture, manufacturing and financial administration. The transition from the timar-supported cavalry system to a large, salaried army transformed the state's financial requirements and contributed to the growing fiscal pressures of later centuries.

References: Linda T. Darling, The Cambridge History of Turkey, Volume 3, “Public Finances: The Role of the Ottoman Center ” (2006); Şevket Pamuk and K. Kıvanç Karaman, “Ottoman State Finances in European Perspective, 1500–1914” (2010); Halil İnalcık and Donald Quataert (eds.), An Economic and Social History of the Ottoman Empire, 1300–1914; Gábor Ágoston, Guns for the Sultan: Military Power and the Weapons Industry in the Ottoman Empire (2005).

14. The Long Transformation: Reforms and Declining Power

The Ottoman Empire did not suddenly decline after Suleiman the Magnificent. It remained a major power for centuries, winning wars, negotiating treaties, developing commerce, and adapting its institutions. However, from the late seventeenth century onward, the empire faced mounting difficulties in defending its territories against increasingly capable rivals. 

Military defeats, financial pressures, provincial power struggles, nationalist movements, and European economic and political influence all contributed to its changing position. Ottoman rulers responded through military, administrative, fiscal, and educational reforms, but these measures were difficult to implement across a diverse empire. 

Reform could strengthen the state while provoking opposition from groups that feared losing their privileges. The result was not a simple, uninterrupted collapse, but a prolonged transformation in which the empire attempted to preserve its independence and territorial integrity under increasingly challenging circumstances.

The Turning Point: Failed Ottoman Siege of  Vienna, 1683

The failed Ottoman siege of Vienna in 1683 was followed by a major European counteroffensive.

• Holy League: The Habsburg monarchy, Poland-Lithuania, Venice, and other powers joined campaigns against the Ottomans at different stages.

• Great Turkish War: The conflict lasted from 1683 to 1699.

• Battle of Zenta, 1697: Habsburg forces under Prince Eugene of Savoy inflicted a major defeat on the Ottoman army.

• Treaty of Karlowitz, 1699: The Ottomans ceded substantial territories in central Europe, including most of Ottoman-controlled Hungary, to the Habsburgs. Other territorial settlements affected Venice and Poland-Lithuania.

Karlowitz is often treated as a major turning point because it formalized significant territorial losses in Europe. Nevertheless, the empire continued to govern extensive territories and remained an important regional power.

Wars with Russia and Other European Powers

Russia became one of the Ottoman Empire’s most consequential rivals, competing for influence around the Black Sea, the Caucasus, and southeastern Europe.

• Access to the Black Sea: Russian expansion threatened Ottoman strategic interests and coastal territories.

• Crimea: Russian pressure on the Crimean Khanate weakened an important Ottoman ally, and Russia annexed Crimea in 1783.

• Russo-Ottoman Wars: Repeated conflicts brought territorial losses, financial strain, and new diplomatic arrangements.

• European Intervention: Britain, France, Austria, and other powers sometimes supported Ottoman territorial integrity while also pursuing their own strategic interests.

European governments did not follow one consistent policy toward the Ottomans. Their positions shifted according to rivalry, trade, diplomacy, and concerns about the balance of power.

Internal Challenges

The empire’s difficulties were not limited to foreign wars.

• Provincial Autonomy: Powerful local notables and regional rulers sometimes exercised considerable independence from the central government.

• Fiscal Pressure: Military expenditure and administrative costs strained public finances.

• Rebellions: Local uprisings and political conflicts repeatedly challenged imperial authority.

• National movements: In the nineteenth century, movements for autonomy or independence gained strength among several subject populations.

• Administrative Complexity: Governing diverse territories required negotiation with local elites, religious institutions, and established communities.

These pressures interacted with foreign intervention. In some regions, nationalist movements received support from external powers; in others, local political, social, and economic circumstances played a greater role.

Selim III and the New Order

Sultan Selim III, who ruled from 1789 to 1807, attempted to modernize the military and strengthen the central government.

His reform programme, known as the Nizam-ı Cedid, or “New Order,” included the creation of a new army trained along European lines and efforts to establish new financial resources to support it.

However, the reforms threatened established interests, including military groups and officials who feared losing influence. Opposition grew, and Selim was deposed in 1807. He was killed the following year during the political crisis surrounding the accession of Mahmud II.

Selim’s experience demonstrated that military modernisation could not be separated from the struggle over political power.

Mahmud II and Centralization

Sultan Mahmud II, who ruled from 1808 to 1839, pursued far-reaching changes.

• Abolition of the Janissaries, 1826: He destroyed the old corps and established a new military structure.

• Administrative Reforms: The government expanded its control over officials and provincial institutions.

• Education and Bureaucracy: New schools and administrative practices were introduced to train personnel for state service.

• Appearance and Public Institutions: Changes in official dress and government organization reflected the sultan’s attempt to create a more centralized state.

These reforms strengthened some aspects of government, but they did not immediately resolve the empire’s financial, military, or territorial difficulties.

The Greek War of Independence

The Greek independence movement began in 1821 and developed into a prolonged war involving Ottoman forces, Greek revolutionaries, and foreign intervention.

The conflict included violence against civilians and competing claims of legitimacy. European philhellenic sentiment and strategic interests contributed to international involvement.

In 1827, British, French, and Russian naval forces defeated an Ottoman-Egyptian fleet at the Battle of Navarino. The subsequent conflict and diplomacy helped lead to the establishment of an independent Greek state, recognised internationally in the early 1830s.

Greek independence demonstrated how nationalist movements and European intervention could weaken Ottoman control over territory.

Muhammad Ali of Egypt and the Limits of Ottoman Authority

Muhammad Ali, the Ottoman-appointed governor of Egypt, developed a powerful regional state with its own army and administrative system.

His forces expanded into other Ottoman territories, creating a major challenge for the sultan. In the 1830s, Egyptian armies under Muhammad Ali’s son Ibrahim Pasha advanced into Syria and Anatolia.

The crisis required international diplomacy and intervention. The Convention of London in 1840 helped restore Ottoman control over Syria, while Muhammad Ali’s family retained hereditary rule in Egypt under Ottoman sovereignty.

The episode showed that the Ottoman government could face powerful challengers not only from abroad but also from within its own imperial system.

Why the Empire Struggled to Maintain its Earlier Position

There was no single cause of Ottoman transformation.

• Military Competition: Rival states developed increasingly effective armies and naval forces.

• Economic Change: Global trade, industrialization, and European financial power altered the economic environment in which the empire operated.

• Territorial Losses: Repeated wars reduced revenue and strategic depth.

• Internal Resistance: Reform programmes encountered opposition from established institutions and local elites.

• Nationalism: Movements for independence or autonomy challenged the empire’s multiethnic political structure.

The Ottoman state continued to adapt, but each reform had to address several connected problems. Strengthening the army required money; raising money could create social hardship; centralising government could provoke provincial resistance; and political concessions could encourage demands for further change.

The empire’s later history was therefore a struggle not simply to reverse decline, but to redefine how it could function in a rapidly changing world.

15. The Tanzimat Era and the Young Turks

During the nineteenth century, Ottoman leaders increasingly recognized that preserving the empire required more than military victories. They sought to reorganize administration, taxation, education, law, and the relationship between the state and its subjects. The Tanzimat era, beginning in 1839, became the most prominent phase of these reforms. 

Reformers aimed to strengthen central authority, improve government efficiency, and present the empire as a modern state capable of surviving in an international system dominated increasingly by European powers. Their programmes also raised difficult questions about citizenship, religious equality, constitutional government, and the rights of different communities. Some reforms achieved lasting changes, while others remained unevenly implemented. 

Later constitutional movements, including the Young Turks, pushed further toward representative government and a reorganization of imperial politics. These developments transformed the empire but did not resolve the national, economic, and strategic crises that ultimately contributed to its dissolution.

The Tanzimat Reforms — 1839–1876

Mustafa Reşid Pasha, a leading architect of the Tanzimat reforms, which began in 1839 and sought to modernize Ottoman administration, law, and government.

The Tanzimat, meaning “reorganization,” refers to a series of reforms intended to strengthen the Ottoman state.

The process is commonly associated with two major proclamations:

• Gülhane Edict, 1839: Announced principles concerning security of life, honor, and property, as well as more regular taxation and military recruitment.

• Reform Edict, 1856: Promised further changes in the legal status of non-Muslim subjects and their access to public institutions.

These measures aimed to establish more predictable government procedures and reinforce loyalty to the state.

Legal and Administrative Changes

• Taxation: Reformers sought more regular and centrally supervised methods of collecting revenue.

• Military Service: Recruitment and service obligations were reorganized, although implementation remained difficult.

• Courts: New legal institutions developed alongside existing Islamic courts and communal legal arrangements.

• Education: State-sponsored schools expanded, particularly for training officials and military personnel.

• Bureaucracy: A more specialized administrative class developed to manage government departments and provincial affairs.

The reforms did not produce complete legal equality or a uniform administrative system overnight. Local practices, political resistance, and financial limitations affected how the measures worked in practice.

The Question of Ottoman Citizenship

Reformers increasingly promoted the idea that subjects of different religious communities should share a common relationship with the state.

This approach is often associated with Ottomanism: the idea that the empire’s diverse population could be united through a common political identity rather than governed exclusively through religious distinctions.

However, the project faced major obstacles. Communities had different political goals, external powers intervened in Ottoman affairs, and the promise of equal treatment did not always match lived realities. Some groups sought greater autonomy or independence rather than a stronger common Ottoman identity.

The First Ottoman Constitution — 1876

Growing demands for constitutional government culminated in the promulgation of an Ottoman constitution in December 1876 under Sultan Abdul Hamid II.

The constitution established a parliament with two chambers and introduced a framework for representative institutions. However, the sultan retained substantial authority.

The constitutional experiment began during a period of severe crisis, including conflict in the Balkans and mounting tension with Russia. In 1878, Abdul Hamid suspended parliament and ruled without a functioning representative legislature for decades.

The constitution was not formally erased from history, and constitutional politics returned in 1908, when the Young Turk Revolution compelled the restoration of parliamentary government.

Who were the Young Turks?

A commemorative lithograph celebrating the Young Turk Revolution of 1908. It portrays figures associated with the movement, including Midhat Pasha, Prince Sabahaddin, Niyazi Bey, and Enver Pasha, alongside the slogan Hürriyet, Müsavat, Uhuvvet — “Liberty, Equality, Fraternity.”

The term “Young Turks” describes a broad political movement that opposed Abdul Hamid II’s authoritarian rule and sought constitutional government and state reform. It included people with different ideologies and political objectives, so it should not be treated as a single organization with completely uniform beliefs.

The Committee of Union and Progress, commonly abbreviated as CUP, became the most influential organization associated with the movement.

Its supporters included military officers, bureaucrats, intellectuals, and activists concerned about the empire’s political direction and territorial survival.

The Young Turk Revolution — 1908

In 1908, military officers and activists associated with the constitutional movement rebelled against the sultan’s government.

Their pressure forced Abdul Hamid II to restore the constitution and reopen parliament.

• Constitutional Restoration: Parliamentary politics returned after decades of suspension.

• Political Participation: Newspapers, political associations, and public debate expanded, though political freedom remained contested.

• Internal Divisions: The constitutional movement contained competing factions with different ideas about centralization, representation, and the empire’s future.

• Continuing Instability: The new political order faced rebellions, foreign intervention, and territorial losses.

In 1909, after an uprising in Istanbul, Abdul Hamid II was deposed and replaced by his brother Mehmed V. The constitutional system continued, but power increasingly came to be dominated by the CUP.

The Balkan Wars — 1912–1913

The Balkan Wars exposed the empire’s vulnerability.

In the First Balkan War, the Balkan League—Serbia, Bulgaria, Greece, and Montenegro—fought the Ottomans and captured most of the empire’s remaining European territories.

The Second Balkan War followed disputes among the former allies over the division of conquered land. The Ottomans recovered Edirne, but their European territorial losses were enormous.

The wars produced mass displacement, civilian suffering, and violence affecting Muslim and Christian communities. They also intensified political debates over nationalism, security, and the future of the empire.

The Limits of Reform

The Tanzimat and constitutional movements changed Ottoman government and society, but their achievements were constrained by several problems.

• Foreign Debt: The state increasingly relied on borrowing and faced serious financial pressures.

• Territorial Losses: The loss of provinces reduced revenue and weakened strategic security.

• Political Divisions: Reformers disagreed over the balance between central authority, representation, and regional autonomy.

• National Movements: Several communities pursued independence or stronger self-government.

• Great-power Rivalry: European states used diplomacy, economic influence, and military pressure to advance their interests.

By the early twentieth century, the Ottoman government faced a difficult combination of internal political struggle and external danger. Abdul Hamid II had attempted to preserve imperial authority through centralization, diplomacy, and religious legitimacy, but his reign became deeply controversial.

16. Abdul Hamid II — The Sultan Who Fought to Save a Crumbling Empire

Sultan Abdul Hamid II’s final public journey through Istanbul following the 31 March Incident. He was deposed by the Ottoman parliament on 27 April 1909 and replaced by his brother Mehmed V.

Abdul Hamid II ruled the Ottoman Empire from 1876 to 1909, during one of the most difficult periods in its history. He inherited a state facing financial weakness, nationalist unrest, European intervention, and pressure for constitutional government. 

His reign began with a constitution and parliament, but he suspended parliamentary government in 1878 and established a highly centralized system of personal rule. He pursued reforms in education, communications, transport, and administration while using censorship, surveillance, and political repression to protect his authority. 

His government also promoted Pan-Islamism, presenting the sultan-caliph as a source of unity for Muslim subjects and a wider Muslim world. Yet his reign was marked by serious violence against Armenians and other communities, continuing territorial losses, and growing opposition among constitutional reformers. 

Abdul Hamid’s rule reflected the central dilemma of late Ottoman politics: how to preserve a threatened empire while responding to demands for political change.

Accession and The Constitution of 1876

Abdul Hamid II became sultan in 1876 amid political turmoil and growing demands for reform.

That year, the Ottoman government promulgated its first constitution, establishing a parliament and defining a framework for constitutional rule.

However, the new political system was soon overshadowed by war. The Russo-Turkish War of 1877–1878 brought a major Ottoman defeat and further territorial losses.

In 1878, Abdul Hamid suspended parliament. The constitution remained part of the empire’s political history, but representative government ceased to function for the following three decades.

The Russo-Turkish War and the Treaty of Berlin

The Russo-Turkish War of 1877–1878 was a major setback for the empire.

Russian forces advanced through Ottoman territories in the Balkans and the Caucasus. The initial Treaty of San Stefano, signed in 1878, proposed substantial changes to the regional balance of power. Other European powers opposed aspects of the settlement, leading to the Congress of Berlin and the Treaty of Berlin later that year.

The settlement resulted in significant territorial and political changes.

• Romania, Serbia, and Montenegro: Their independence received international recognition under the settlement.

• Bulgaria: An autonomous Bulgarian principality was established, while other Bulgarian territories remained under different arrangements.

• Austria-Hungary: It received authority to occupy and administer Bosnia and Herzegovina.

• Russia: It gained territories in the Caucasus.

• Ottoman Empire: Its authority in southeastern Europe and parts of the Caucasus was further reduced.

The treaty did not end the empire, but it demonstrated the extent to which Ottoman territorial arrangements could be reshaped through war and European diplomacy.

Abdul Hamid’s Centralized Government

After suspending parliament, Abdul Hamid strengthened the palace’s role in government.

• Censorship: Newspapers, books, and political publications were subject to restrictions.

• Surveillance: Government networks monitored suspected opponents and political activists.

• Administrative Centralization: The palace sought tighter control over provincial officials and political institutions.

• Opposition: Constitutionalists, dissident officers, intellectuals, and other critics challenged the sultan’s system.

Supporters of centralization viewed it as necessary to protect the state from fragmentation and foreign interference. Critics argued that authoritarian government restricted political participation and prevented meaningful accountability.

Education, Railways, and Communications

Abdul Hamid’s reign also saw investment in infrastructure and state institutions.

• Education: The government expanded state schools and institutions for training officials and professionals.

• Railways: Railway development improved transport in several regions and supported military movement, commerce, and administration.

• Telegraph: Communications networks helped the government transmit information and instructions more quickly.

• Public Administration: The state sought to strengthen its presence in provinces through officials, schools, and infrastructure.

These developments had practical value, but they also supported the central government’s capacity to monitor and administer the population.

Pan-Islamism and the Caliphate

Abdul Hamid promoted Pan-Islamism, which emphasized the sultan’s position as caliph and the shared political and religious connections of Muslim communities.

The policy served several purposes:

• It strengthened the religious dimension of the sultan’s legitimacy.

• It encouraged loyalty among Muslim subjects in a diverse empire.

• It offered a diplomatic resource in relations with Muslim communities beyond Ottoman borders.

• It provided an alternative to political movements that threatened to fragment the empire.

Pan-Islamism did not erase regional, linguistic, or political differences among Muslims, and it did not prevent territorial losses. Its effectiveness varied according to local circumstances and the interests of other powers.

Abdulhamid II: His Legacy, Downfall, Confinement and Death

The Legacy of Sultan Abdulhamid II (1876–1909)

Sultan Abdulhamid II ruled the Ottoman Empire for more than thirty years, during one of the most difficult periods in its history. He inherited an empire facing financial crisis, territorial losses, foreign interference and growing nationalist movements. 

Remembered by supporters as Ulu Hakan (the Great Khan), he tried to preserve the empire through centralized authority, diplomacy, intelligence networks and modernization. During his reign, railway networks expanded, including the Hejaz Railway, and developments took place in education, communications and public infrastructure.

The Suspension of the Constitution and His Authoritarian Rule

Abdulhamid came to the throne in 1876 and initially accepted a constitutional system that established an Ottoman parliament. However, following the disastrous Russo-Ottoman War of 1877–1878, he suspended parliament in 1878 and concentrated power in the palace. 

His government relied heavily on censorship, surveillance and political restrictions to suppress opposition. Although he presented these measures as necessary to protect the empire from disintegration, they created deep resentment among constitutionalists, reformers and political opponents. His increasingly authoritarian rule became one of the major reasons for the growth of the Young Turk opposition.

The Young Turk Revolution and His Fall in 1908–1909

In July 1908, officers and supporters of the Committee of Union and Progress (CUP), commonly associated with the Young Turk movement, launched a revolution demanding the restoration of the constitution. Facing growing military and political pressure, Abdulhamid was forced to restore the constitution and reconvene parliament. 

His position weakened further after the counter-revolutionary uprising of April 1909, known as the 31 March Incident. The Army of Action, advancing from Salonica, entered Constantinople and suppressed the uprising. The Ottoman parliament subsequently voted to depose Abdulhamid on 27 April 1909, ending his thirty-three-year reign. His younger brother, Mehmed V, was proclaimed sultan.

His Removal and Confinement in Salonica

Following his deposition, Abdulhamid was taken from Constantinople and sent into guarded confinement at the Alatini Mansion in Salonica, then part of the Ottoman Empire. He lived there under surveillance with members of his household and was prevented from exercising political authority.

His confinement lasted until the outbreak of the First Balkan War in 1912, when Ottoman forces faced the loss of Salonica to Greece. Fearing that the former sultan might fall into enemy hands, the Ottoman government arranged for his return to Constantinople. He was brought back to the capital in November 1912 and placed under confinement at Beylerbeyi Palace.

His Final Years and Death

Abdulhamid spent the remaining years of his life at Beylerbeyi Palace, living under supervision and away from political power. Although he had once ruled an empire from the imperial palace, he now lived as a deposed monarch, unable to return to the throne. 

He died on 10 February 1918, aged 75, from complications associated with pneumonia. His death came only months before the Ottoman Empire's defeat in the First World War and less than five years before the abolition of the Ottoman sultanate in 1922. He was buried in the mausoleum of his grandfather, Sultan Mahmud II, in Constantinople.

The Historical Legacy

Abdulhamid II remains one of the most debated rulers in Ottoman history. Supporters credit him with keeping the empire together during decades of foreign pressure, strengthening Islamic unity and promoting infrastructure and education. Critics remember his suspension of parliament, censorship, surveillance and repression of political opposition. 

His reign witnessed both significant modernization and serious political decline. His eventual deposition did not immediately end the Ottoman dynasty, but it marked the collapse of the old palace-centered system of government and the growing dominance of the Committee of Union and Progress.

17. The First World War and the Dissolution of the Empire

The Ottoman Empire entered the First World War in 1914, joining the Central Powers against the Entente. The Ottoman government formally declared war on Britain and France in November 1914.

By the beginning of the twentieth century, the Ottoman Empire had lost much of its former territory in Europe and faced serious financial, political, and military challenges. The Balkan Wars of 1912–1913 had inflicted further losses, displaced large populations, and intensified fears about the empire’s survival. In 1914, the Ottoman government entered the First World War on the side of Germany and Austria-Hungary, known as the Central Powers.

 Ottoman leaders hoped that an alliance with Germany would strengthen the state’s military position and help protect its remaining territories. Instead, the war opened several demanding fronts and placed enormous pressure on the empire’s economy and population. Although Ottoman forces achieved important victories, including at Gallipoli, the empire eventually suffered military defeat. Wartime mass violence, including the Armenian Genocide, caused immense human suffering. 

The Armistice of Mudros in October 1918 ended Ottoman participation in the war, but the struggle over the empire’s future continued through occupation, diplomatic negotiations, and the Turkish national movement.

Why the Ottoman Empire Entered the War

The Ottoman government’s decision to join the Central Powers resulted from strategic calculations, military relationships, and fears about the empire’s position.

• Security Concerns: Ottoman leaders wanted stronger protection against Russia and other powers with territorial ambitions in Ottoman lands.

• German Military Ties: German officers had helped train and advise Ottoman forces, strengthening the military relationship between the two states.

• Territorial Ambitions: Some Ottoman leaders hoped victory might recover lost territory or improve the empire’s strategic position.

• Political Divisions: Ottoman leaders disagreed over foreign policy, but the Committee of Union and Progress exercised decisive influence.

• The Black Sea Incident: In October 1914, Ottoman warships attacked Russian ports in the Black Sea. Russia declared war shortly afterward, followed by Britain and France.

The empire formally entered the war against the Entente powers in late 1914.

The Major Ottoman Fronts

The Gallipoli Campaign — 1915–1916

The Allies attempted to force the Dardanelles, capture or neutralize Constantinople, and establish a route for supplying Russia.

Ottoman forces resisted the naval assault and subsequent landings on the Gallipoli Peninsula. Mustafa Kemal, later known as Atatürk, emerged as a prominent commander during the campaign.

The Allies evacuated their forces in early 1916 after failing to achieve their objectives. The victory strengthened Ottoman morale and became a major part of modern Turkish national memory. The campaign also caused heavy casualties among Ottoman, British, French, Australian, New Zealand, and other forces.

The Caucasus Front

Ottoman forces fought Russia across difficult mountainous terrain in eastern Anatolia and the Caucasus.

The Ottoman winter offensive at Sarıkamış in late 1914 and early 1915 ended disastrously, with severe losses caused by combat, exposure, disease, and logistical failures. Russian advances subsequently threatened Ottoman territories in eastern Anatolia.

The front also became entangled with the empire’s treatment of Armenian communities, as Ottoman authorities increasingly portrayed Armenians as a security threat.

Mesopotamia and Palestine

British forces advanced into Ottoman-controlled Mesopotamia, where the struggle centered on strategic routes, river transport, and access to oil-producing areas. British troops captured Baghdad in March 1917.

In Palestine, British forces under General Edmund Allenby advanced against Ottoman positions. Jerusalem fell to British forces in December 1917, and subsequent campaigns pushed Ottoman forces farther north.

These defeats weakened Ottoman control of Arab provinces and increased the strain on an already overstretched military.

The Arab Revolt — 1916–1918

The Arab Revolt began in 1916 under Sharif Hussein of Mecca and his sons, including Faisal. The revolt challenged Ottoman authority in parts of the Arabian Peninsula and received British support.

Its causes included Arab political aspirations, opposition to Ottoman policies, regional rivalries, and British strategic interests. However, Arab opinion was not uniform: many Arabs continued serving in Ottoman institutions or remained outside the revolt.

The revolt contributed to Ottoman military difficulties in the region, particularly through attacks on railways and other supply routes. It also became part of the wider political struggle over the future of Ottoman Arab territories.

British wartime diplomacy included commitments and proposals concerning Arab independence, while Britain and France also made arrangements for dividing influence in parts of the region. These competing expectations helped shape the disputes that followed the war.

The Armistice of Mudros — 30 October 1918

By autumn 1918, the Ottoman military position had deteriorated sharply. Bulgaria’s withdrawal from the war weakened the empire’s strategic situation, while Allied advances in the Middle East increased pressure on Ottoman forces.

The Ottoman government signed the Armistice of Mudros on 30 October 1918.

• Military Consequences: Ottoman forces were required to demobilize under the armistice’s terms, and the Allies gained extensive strategic rights.

• Straits: The Allies obtained control over access to the Dardanelles and Bosporus.

• Occupation: Allied forces subsequently occupied key locations, including Constantinople.

• Political Crisis: The armistice weakened the government’s ability to defend the remaining territories and intensified disputes over the empire’s future.

The armistice ended Ottoman participation in the First World War, but it did not itself abolish the empire.

The Treaty of Sèvres — 1920

The victorious Allied powers attempted to establish a postwar settlement through the Treaty of Sèvres, signed on 10 August 1920.

The treaty proposed extensive territorial reductions and restrictions on the Ottoman state. It included arrangements affecting the Straits, provisions concerning areas of Anatolia, and provisions for Armenian and Kurdish questions.

However, the treaty was never implemented as the final settlement. The Turkish national movement rejected it and fought to prevent the proposed territorial arrangements from being imposed.

The Turkish National Movement

Mustafa Kemal and other nationalist leaders organized resistance to Allied occupation and the authority of the Ottoman government in Istanbul.

The movement developed its own political institutions, assembled military forces, and fought against Greek forces in western Anatolia as well as other opponents. It gained strength as the Ottoman government’s authority weakened.

The nationalist struggle culminated in the establishment of a new political order centered on Ankara. Its leaders argued that sovereignty belonged to the nation rather than exclusively to the Ottoman dynasty.

The Treaty of Lausanne — 1923

Following the nationalist victory and further diplomatic negotiations, the Treaty of Lausanne was signed on 24 July 1923.

It recognized the sovereignty and international boundaries of the new Turkish state, replacing the unimplemented Treaty of Sèvres as the principal peace settlement.

The treaty also addressed matters including population exchanges between Greece and Türkiye, subject to defined exceptions. The exchange forcibly displaced large numbers of people and had profound consequences for communities on both sides.

The End of the Ottoman Empire

The empire’s final dissolution occurred through a series of political changes rather than one single event.                      

• 30 October 1918: Armistice of Mudros.

• 10 August 1920: Treaty of Sèvres signed but never implemented as the final settlement.

• 1 November 1922: The Turkish Grand National Assembly abolished the sultanate.

• 17 November 1922: Mehmed VI left Constantinople aboard the British warship HMS Malaya.

• 24 July 1923: Treaty of Lausanne signed.

• 29 October 1923: The Republic of Türkiye was proclaimed.

• 3 March 1924: The caliphate was abolished, ending the Ottoman dynasty’s remaining caliphal institution.

The Ottoman Empire had lasted for roughly six centuries. Its dissolution followed military defeat, internal political conflict, territorial losses, nationalist mobilization, and the creation of a new Turkish state.

18. Mehmed VI Vahideddin — The Last Ottoman Sultan and The End of an Empire

Mehmed VI, also known as Vahideddin, became the last Ottoman sultan in July 1918, during the final months of the First World War. He inherited a state facing military defeat, economic hardship, foreign pressure, and deep political division. The armistice of October 1918 left the empire vulnerable to Allied occupation and disputes over its remaining territories. 

Mehmed attempted to preserve the dynasty and maintain a role for the Ottoman government, but his authority was increasingly challenged by the nationalist movement led by Mustafa Kemal. The conflict between the sultan’s government in Constantinople and the nationalist assembly in Ankara became central to the empire’s final years. 

In November 1922, the Turkish Grand National Assembly abolished the sultanate, ending the Ottoman dynasty’s political rule. Mehmed left Constantinople shortly afterward and spent his remaining years in exile. His reign marked the formal end of a dynasty that had governed one of history’s most influential empires.

Sultan Mehmed VI joins Shaykh al-Islām Medeni Mehmet Nuri Efendi and Grand Vizier Ahmed Tevfik Pasha in prayer before departing Istanbul on 17 November 1922, following the abolition of the Ottoman sultanate.

Accession During a National Crisis

Mehmed VI became sultan on 4 July 1918, succeeding his brother Mehmed V.

The empire was already suffering from the consequences of the war. Ottoman forces faced setbacks on several fronts, the economy was under severe strain, and food shortages and displacement affected civilians.

When the Ottoman government signed the Armistice of Mudros in October 1918, the empire’s military position had become untenable. Allied occupation and demands for territorial concessions further undermined the government’s authority.

The Occupation of Constantinople

Allied forces occupied important locations in Constantinople following the armistice. The occupation intensified political disputes over whether the Ottoman government could protect the empire’s remaining territories and maintain national sovereignty.

Mehmed VI and his advisers attempted to preserve the dynasty’s position through diplomacy and cooperation with the occupying powers. Nationalist leaders, however, believed that resistance was necessary to prevent the partition of Anatolia and the loss of political independence.

The resulting division between the sultan’s government and the nationalist movement became increasingly difficult to resolve.

The Nationalist Government in Ankara

Mustafa Kemal and his supporters established the Grand National Assembly in Ankara in April 1920. The assembly claimed to represent the Turkish nation and challenged the authority of the government in Constantinople.

The nationalist movement fought against the proposed postwar settlement and against Greek forces advancing into Anatolia. Its military and political successes strengthened Ankara’s position.

The conflict was not simply a contest between two individual leaders. It concerned the source of sovereignty, the future of the Ottoman dynasty, and whether the postwar state would be governed by a sultan or by a new national political institution.

Abolition of the Sultanate — 1 November 1922

On 1 November 1922, the Grand National Assembly abolished the Ottoman sultanate.

This decision ended the sultan’s political authority. The assembly separated the institution of the sultanate from the caliphate, which continued briefly under a different member of the dynasty.

Mehmed VI’s position became untenable. On 17 November 1922, he left Constantinople aboard the British warship HMS Malaya and went into exile.

His departure marked the end of the Ottoman sultans’ direct rule, although the caliphate remained for a short period.

Exile and Death

Mehmed VI spent his final years outside Türkiye, living in different locations in Europe and the Mediterranean.

He died in Sanremo, Italy, on 16 May 1926. He never returned to rule the Ottoman state, which no longer existed.

His life after exile reflected the fate of a dynasty whose political foundations had been dismantled by war, revolution, and the creation of a new republic.

The Republic of Türkiye

On 29 October 1923, the Republic of Türkiye was proclaimed, with Mustafa Kemal as its first president.

The new republic replaced the Ottoman sultanate’s dynastic political order with a national government. On 3 March 1924, the caliphate was also abolished, ending the Ottoman dynasty’s remaining formal religious-political institution.

The new state subsequently pursued major changes in government, law, education, and public institutions. These reforms reshaped Turkish society and established a political system distinct from the Ottoman monarchy.

The Legacy of the Last Sultan

Mehmed VI remains a controversial figure because historians differ in their interpretations of his decisions during the occupation and nationalist struggle. His supporters could view his actions as attempts to preserve the dynasty and prevent further destruction, while critics regarded his reliance on the occupying powers as incompatible with national resistance.

What is clear is that his reign coincided with the final collapse of the Ottoman political order. The empire’s end resulted from a much wider set of forces, including military defeat, territorial fragmentation, nationalist mobilization, foreign intervention, and the transformation of political ideas about sovereignty.

The Ottoman dynasty had ruled for centuries, but its survival depended on institutions and circumstances that could no longer be maintained after the First World War. Mehmed VI became the last sultan not because the empire’s history ended with one man, but because the political system that sustained the dynasty was replaced by a new republic.

19. From a Frontier Principality to a Modern Republic

The Ottoman Empire began as a small frontier principality in northwestern Anatolia and developed into a major power across Europe, Asia, and Africa. Its rulers conquered Constantinople, governed diverse populations, built influential institutions, and shaped the military, political, architectural, and cultural history of their regions.

Its history included remarkable achievements as well as serious violence, dynastic executions, unequal legal status, slavery, forced displacement, and mass atrocities. Its rulers repeatedly tried to adapt to changing military and economic conditions, but reforms could not resolve every internal conflict or reverse the consequences of prolonged wars and territorial losses.

The First World War brought the empire’s final crisis. The abolition of the sultanate in 1922 and the proclamation of the Republic of Türkiye in 1923 ended the Ottoman political order. The abolition of the caliphate in 1924 completed the removal of the dynasty’s remaining formal institution.

The empire disappeared, but its legacy remains visible in the architecture of Istanbul, the borders and institutions of several modern states, the histories of communities once governed by the sultans, and the continuing debates over imperial rule, national identity, and historical memory.

From Osman I’s frontier principality to the republic established after the empire’s collapse, Ottoman history reveals how states rise, adapt, transform, and sometimes come to an end.