The Treaty of Sevres in 1920 ended World War I between Turkey and the Allies, requiring Turkey to cede land to Greece and control of the Black Sea Straits, and lose its colonies in the Middle East. It was unpopular among Turks as it was signed by their unpopular sultan. The treaty was never enforced as Mustafa Kemal Ataturk came to power in a revolution and refused to accept the harsh terms, replacing it with the less severe Treaty of Lausanne.