The Treaty of Sèvres was a 1920 treaty signed between the Allies of World War I and the Ottoman Empire. The treaty ceded large parts of Ottoman territory to France, the United Kingdom, Greece and Italy, as well as creating large occupation zones within the Ottoman Empire. It was one of a series of treaties that the Central Powers signed with the Allied Powers after their defeat in World War I. Hostilities had already ended with the Armistice of Mudros. The Treaty of Sèvres marked the beginning of the partitioning of the Ottoman Empire. The treaty's stipulations included the renunciation of most territory not inhabited by Turkish people and their cession to the Allied administration.

The terms stirred hostility and Turkish nationalism. The treaty's signatories were stripped of their citizenship by the Grand National Assembly, led by Mustafa Kemal Pasha, which ignited the Turkish War of Independence. Hostilities with Britain over the neutral zone of the Straits were narrowly avoided in the Chanak Crisis of September 1922, when the Armistice of Mudanya was concluded on 11 October, leading the former Allies of World War I to return to the negotiating table with the Turks in November 1922. The 1923 Treaty of Lausanne, which superseded the Treaty of Sèvres, ended the conflict and saw the establishment of the Republic of Turkey.