Treaty of Lausanne

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History & Society

Treaty of Lausanne

Allies-Turkey [1923]

Written and fact-checked by The Editors of Encyclopaedia Britannica

Last Updated: Mar 15, 2024 • Article History

Category: History & Society

Date:: July 24, 1923

Participants:: France; Greece; Italy; Japan; Kingdom of Serbs, Croats, and Slovenes; Turkey; United Kingdom

On the Web:: Republic of Türkiye - Ministry of Foreign Affairs - Lausanne Peace Treaty VI. Convention Concerning the Exchange of Greek and Turkish Populations Signed at Lausanne, January 30, 1923 (Mar. 15, 2024)

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Treaty of Lausanne, (1923), final treaty concluding World War I. It was signed by representatives of Turkey (successor to the Ottoman Empire) on one side and by Britain, France, Italy, Japan, Greece, Romania, and the Kingdom of Serbs, Croats, and Slovenes (Yugoslavia) on the other. The treaty was signed at Lausanne, Switzerland, on July 24, 1923, after a seven-month conference.

The treaty recognized the boundaries of the modern state of Turkey. Turkey made no claim to its former Arab provinces and recognized British possession of Cyprus and Italian possession of the Dodecanese. The Allies dropped their demands of autonomy for Turkish Kurdistan and Turkish cession of territory to Armenia, abandoned claims to spheres of influence in Turkey, and imposed no controls over Turkey’s finances or armed forces. The Turkish straits between the Aegean Sea and the Black Sea were declared open to all shipping.

The Editors of Encyclopaedia Britannica This article was most recently revised and updated by Adam Augustyn.