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The International Straits Commission was an international agency that, under the auspices of the League of Nations, managed the Turkish Straits (the Dardanelles and Bosporus) from 1923 to 1936.
In the aftermath of World War I and the 1920 Treaty of Sevres, the Straits were demilitarized and internationalized. In 1923 the Treaty of Lausanne revised the terms of Sevres, and restored Turkish sovereignty, but the Straits remained open unrestricted civilian and military traffic, under the auspices of the International Straits Commission, headed by a Turkish national. This status remained until the 1936 Montreux Convention Regarding the Regime of the Straits, which abolished the Commission and gave full control to Turkey, which was allowed to remilitarize the Straits and forbid traffic to belligerent countries, while restrictions were placed on the passage of warships.