<P> The Ottoman Empire participated in World War I as one of the Central Powers . The Ottoman Empire entered the war by carrying out a surprise attack on Russia 's Black Sea coast on 29 October 1914 , with Russia responding by declaring war on it on November 5th , 1914 . Ottoman forces fought the Entente in the Balkans and the Middle Eastern theatre of World War I . The Ottoman Empire 's defeat in the war in 1918 was crucial in the eventual dissolution of the empire in 1921 . </P>
when did the ottoman empire surrender in ww1
1918