The Greco-Turkish War (1919-1922) was a conflict between the Kingdom of Greece and the Turkish National Movement following World War I. The war arose from territorial disputes in the aftermath of the Ottoman Empire's collapse, particularly over the region of Western Anatolia. Greece aimed to expand its territory, while Turkish forces sought to establish a new nation. The war ended with a decisive victory for the Turkish forces led by Mustafa Kemal Atatürk. The conflict resulted in significant territorial losses for Greece and the establishment of the Republic of Turkey in 1923, reshaping the political landscape of the region.