Ataturk, Mustafa Kemal(born 1881, Salonika, Greece, Ottoman Empire-died Nov. 10, 1938, Istanbul, Tur.) Founder of modern Turkey. Dedicated by his father to military service, he graduated near the top of his class in military school. As a young officer, he was critical of the government of the Ottoman Empire and became involved with the Turkish nationalist Committee of Union and Progress. He nevertheless fought for the government during World War I (1914-18), achieving great success against Allied forces during the Dardanelles Campaign.