 During the World War I, both Italy and Greece were members of the Allies and fought against the Central Powers but when the Italians found that Greece had been promised land in Anatolia at the Paris Peace Conference, 1919, the Italian delegation withdrew from the conference for several months.Italy occupied parts of Anatolia which threatened the Greek occupation zone and the city of Smyrna.Greek troops were landed and the Greco-Turkish War (1919–22) began with Greek troops advanced into Anatolia.