The Greco-Turkish War continued until the Greek defeat of Sakarya in August – September 1921 , and the siege and burning of Smyrna ( now İzmir ) by the Turks in September 1922 . After these events , the country plunged into a deep political and moral crisis . While Mustafa Kemal and his armies gradually reconquered Anatolia and east Thrace , thousands of Greeks were murdered and others fled from Asia Minor to find refuge in Greece . This was called the " Great Disaster " , which was definitive a few months later with the signing of the Treaty of Lausanne ( 24 July 1923 )
thousands of Greeks were murdered
Greek genocide
Sophia of Prussia