Despite their territorial gains following the Paris Peace Conference, the Greeks still hoped to achieve the "Megali Idea" and annex Constantinople and larger areas of Ottoman Asia Minor; they invaded Anatolia beyond Smyrna and sought to take Ankara, with the aim of destroying the Turkish resistance led by Mustafa Kemal (later known as Atatürk). Thus began the Greco-Turkish War (1919–1922). Although Alexander's reign saw success after success for the Greek armies, it was eventually Atatürk's revolutionary forces that obtained victory in 1922, negating the gains made under Alexander.