Fall of the Ottoman Empire

Overview

The fall of the Ottoman Empire was a process of military defeat, territorial loss and political transformation that culminated after World War I. The empire signed an armistice with the victorious powers in 1918. Allied forces then took control of parts of its remaining territory, while a Turkish national movement rejected the postwar settlement proposed by the victors. The Ottoman sultanate ended in 1922, the Republic of Turkey was established in 1923, and the caliphate was abolished in 1924. These events ended institutions that had governed large parts of the Middle East for centuries. ^[1][2]

The empire’s dissolution also changed who governed its former Arab provinces. Iraq became a British mandate territory, while Syria became a French mandate territory and Lebanon came under French rule. The postwar settlement altered the status of Mosul, which the Ottomans had controlled for roughly four centuries, and helped establish borders that divided Kurdish communities among Turkey, Iraq, Iran and Syria. In the Balkans, Ottoman retreat was followed by further changes to state boundaries, including Kosovo’s incorporation into Serbia and the formation of a South Slavic kingdom. ^[3][4][5][6]

No single agreement determined every outcome. Britain and France had planned spheres of influence in 1916 through the Sykes–Picot Agreement, assuming the empire would be partitioned after the war. By the fighting’s end, their ambitions remained far from realization. The 1920 Treaty of Sèvres proposed a major settlement with the Ottoman government, but Turkish national resistance prevented its full implementation. The 1923 Treaty of Lausanne instead recognized the new Turkish state’s position. Together, war, diplomacy and local political movements determined the shape of the post-Ottoman order. ^[7][8][9]

Rise

The Ottoman state grew from an Anatolian principality into an empire spanning southeastern Europe, Anatolia and much of the Middle East. Its rulers governed diverse peoples through military power, provincial administration and negotiated relationships with local elites. Istanbul served as the imperial capital after the Ottoman conquest of Constantinople in 1453. By the early sixteenth century, Ottoman expansion brought the empire into direct competition with the Safavid rulers of Iran and extended Ottoman authority into Arab and Kurdish lands. The institutions dismantled after World War I had developed through this long history of conquest and imperial government. ^[1][10]

The history of Mosul illustrates how conquest depended on local alliances. Sultan Selim I conquered the city in 1517 with Kurdish assistance. Kurdish diplomat Idris Betlis persuaded 25 Kurdish princes to transfer their allegiance from the Safavids to Istanbul, strengthening Ottoman control in Kurdistan. During the sixteenth-century campaigns, the princes of Soran and Cizre seized Kirkuk and Mosul in the Ottomans’ name. Ottoman power in the area therefore rested partly on Kurdish nobles’ allegiance as well as imperial forces. Mosul remained under Ottoman control for about four centuries, until the aftermath of World War I. ^[10]

Ottoman expansion joined regions with different languages, religious communities and political traditions under one imperial structure. Cities such as Baghdad, Damascus and Mosul were linked to Istanbul, although their relationships with the capital varied across time. Local leaders retained influence within an administration that combined central appointments with provincial arrangements. That history matters to the empire’s fall: the territories later assigned to separate mandates and states had previously been connected by Ottoman sovereignty without being identical provinces or a single uniform society. The replacement of imperial authority required new arrangements for each region. ^[3][7][10]

Rule and society

Before the collapse, the territory of today’s Iraq was divided among the Ottoman provinces of Mosul, Baghdad and Basra. These provinces had distinct geographic positions and political concerns. Mosul’s ties to Kurdish lands and its location near Anatolia made its fate especially consequential when the empire lost the city after World War I. Baghdad and Basra also became part of the territory administered under Britain’s postwar mandate. The creation of Iraq brought areas once governed as separate Ottoman provinces into a new political framework. ^[3][10]

Religious institutions crossed imperial borders. Shiite clerics in Najaf lived under Ottoman rule until the early twentieth century, yet Iraqi Shiite scholars were deeply involved in politics in Iran. During Iran’s constitutional struggle, Ottoman-era clerics differed over whether to support its monarchy or constitutional movement. Their activity shows that the Ottoman–Iranian frontier did not confine religious debate to one state. After Ottoman rule ended, tensions between the seminaries of Najaf and Qom developed within a changed regional order; the rise of the Islamic Republic in Iran in 1979 intensified those tensions. ^[11]

Ottoman government also relied on relationships with communities whose leaders held authority close to home. Kurdish princes’ support for Selim I helped establish Ottoman control around Mosul, while later generations lived within an empire whose provincial boundaries did not match a single Kurdish state. Across the empire, subjects’ experiences differed by locality, period, religion and position in society. The postwar replacement of this system with republics, monarchies and mandates shifted authority to new capitals and administrations. It did not erase older ties among cities, seminaries, trading routes and communities that had formed under Ottoman rule. ^{[3][9][10][11]}

Jews under its rule

Jewish communities were part of Ottoman society across the empire’s long history. After Jews fled persecution in Spain and Portugal during the fifteenth and sixteenth centuries, Sultan Bayezid II welcomed refugees into Ottoman lands. In the Balkans, some entered the salt trade. These communities had histories extending well before the empire’s final years, and their circumstances differed among its provinces. Ottoman rule in the Balkans ended through a succession of military and political changes rather than through one simultaneous transfer of every town. ^[5]

The post-Ottoman Balkan realignment placed Kosovo within Serbia. About 500 Jews lived in Kosovo at the time. Serbia and Montenegro joined the State of Slovenes, Croats and Serbs to form the Kingdom of Serbs, Croats and Slovenes, later renamed the Kingdom of Yugoslavia. For Jewish residents, the change meant living under a new state after centuries in a region shaped by Ottoman government. Their small community was one example of how altered borders affected people as well as diplomatic maps. ^[5]

In the Land of Israel, the Jewish people’s historical connection and right to reestablish their national home remained intact through Ottoman rule. Zionism, the Jewish national movement for self-determination in that historic homeland, developed before the empire fell. The British government’s Balfour Declaration of November 2, 1917, supported establishment of a national home for the Jewish people. It also specified protection for the civil and religious rights of existing non-Jewish communities and for the rights and political status of Jews in other countries. The declaration recognized an existing Jewish national connection; the postwar settlement did not create that connection. ^[12][13][14]

The League of Nations later incorporated the Balfour Declaration into the British mandate arrangement and recognized the Jewish people’s historical connection to the land and right to reestablish their national home. Britain received responsibility for creating conditions for that home. The transition from Ottoman to British administration therefore changed the governing authority while placing an earlier Jewish national aspiration within an international legal framework. Jewish communities in the Land of Israel and elsewhere in the former empire entered the postwar period under different governments, illustrating the varied consequences of Ottoman dissolution. ^[13][14][15]

Decline

Ottoman defeat in World War I brought the empire’s remaining territorial and political strains to a decisive point. Ottoman forces fought on several fronts, and the war ended with the loss of imperial control over much of the Middle East. Wartime violence included the Armenian genocide, carried out by Ottoman authorities as the empire fought for survival. On October 30, 1918, the Ottoman government signed the Armistice of Mudros with the victorious powers. The armistice ended the fighting and created conditions for British, French and Greek forces to take control of parts of Ottoman territory. ^[1][2][16]

Even before the armistice, Britain and France had negotiated a plan for lands they expected the Ottomans to lose. The 1916 Sykes–Picot Agreement assigned the two powers proposed areas of direct control and influence in the Middle East. French plans covered parts of the Levant, while British plans covered southern Mesopotamia and other strategic areas. The agreement also envisaged areas under Arab administration subject to British or French influence. It was a wartime plan for an anticipated partition, not a final map: military developments, later negotiations and political movements changed its proposed arrangements. Nevertheless, it became an important reference point in the process that shaped post-Ottoman borders. ^[7][17]

British and French objectives had not been fully achieved when the war ended. The victors still had to decide how to govern territory removed from Ottoman authority, while people within those territories pursued their own political aims. The 1920 Treaty of Sèvres was a major attempted postwar settlement. Signed with the Ottoman government on August 10, it formalized extensive territorial losses and proposed a reduced Ottoman state. Its provisions addressed former Arab provinces and raised the prospect of Kurdish self-government. Turkish nationalists rejected the settlement, and its proposed political order was not fully carried out. ^[8][9][16]

Mustafa Kemal Atatürk led the Turkish National Movement that arose as foreign armies entered Ottoman lands. From 1919, its supporters organized political and military resistance and established a rival center of authority in Ankara. Their campaign changed the terms on which the victorious powers could reach peace with Turkey. In 1922, Turkish nationalists abolished the Ottoman sultanate, ending the institution that had embodied imperial rule. The last sultan’s removal separated the movement’s claim to govern Turkey from the old dynasty. ^[2][16]

The Treaty of Lausanne, signed on July 24, 1923, replaced Sèvres as the principal peace settlement with Turkey. Later that year, Atatürk established the Republic of Turkey and became its first president. He directed the new state toward a pro-Western program of republican government and reform. On March 3, 1924, Turkey abolished the Ottoman caliphate, ending a religious-political institution that had survived the sultanate’s abolition. The first week of March 2024 marked a century since that final step. Ottoman collapse was thus completed through several decisions over six years, rather than by the 1918 armistice alone. ^{[2][8][16][18]}

Legacy

The end of Ottoman rule transformed the political geography of the Middle East. Syria came under a French mandate, Iraq under a British mandate, and Lebanon under French rule. The mandates replaced Ottoman sovereignty with administrations authorized through the postwar international system. They also placed communities with different religious, linguistic and regional histories inside newly governed territories. Baghdad and Damascus remained important centers, but their political relationships to Istanbul and to one another changed. The borders and institutions formed in this period shaped the states that later emerged from mandate rule. ^[3][4][7]

Mosul was among the places where the change remained especially consequential. The Ottomans lost the city after World War I, ending control that had begun with Selim I’s conquest in 1517. Mosul’s incorporation into the new Iraqi framework joined it to Baghdad and Basra under British mandate administration. Kurdish communities across the former Ottoman lands were left divided among Turkey, Iraq and Syria, while Kurdish communities in Iran remained within that state. Sèvres had raised hopes of Kurdish self-government, but Lausanne did not establish a Kurdish state. Borders and sovereignty remained central concerns in Kurdistan after the Ottoman era. ^[9][10][18]

The significance of Mosul persisted long after the treaties. During the 1991 Gulf War, Turkish president Turgut Özal requested a military plan to prevent Kurdish control of Mosul and Kirkuk if Iraq broke apart. Later, President Recep Tayyip Erdoğan promoted nostalgia for Ottoman imperial greatness while Turkey considered its influence around Mosul. These episodes did not restore Ottoman rule. They showed how the former imperial frontier, Kurdish political aspirations and the fate of Mosul continued to affect Turkish policy. ^[10][19]

The disappearance of the caliphate also influenced later political movements. Its end helped shape the early outlook of Hassan al-Banna, whose Muslim Brotherhood developed in the post-Ottoman period. In 2014, Abu Bakr al-Baghdadi declared a caliphate for the Islamic State, a terrorist organization, invoking an institution abolished in Turkey 90 years earlier. That declaration did not revive the Ottoman institution; it demonstrated the continuing political force of its name in movements with very different aims from those of the former empire. ^[2][20]

The Ottoman collapse also remains part of historical memory in Turkey and across the territories once under its rule. Atatürk’s republic marked a deliberate break with dynastic government, while later appeals to Ottoman grandeur offered a different interpretation of the past. In the Balkans, new borders placed Kosovo in Serbia and helped create the kingdom later called Yugoslavia. In the Middle East, the fall changed the governments of Syria, Lebanon, Iraq and the Land of Israel. Its lasting significance lies in this combination of military defeat, ended imperial institutions, new national movements and borders that continued to shape regional politics. ^{[3][4][5][19]}