During the Greco-Turkish War, a conflict which followed the Hellenic occupation of Smyrna in May 1919 and continued until the Great Fire of Smyrna in September 1922, atrocities perpetrated by both the Hellenic and Turkish armies. For the massacres that occurred during the Greco-Turkish War of 1919–1922, British historian Arnold J. Toynbee wrote that it was the Greek landings that created the Turkish National Movement led by Mustafa Kemal: "The Greeks of 'Pontus' and the Turks of the Greek occupied territories, were in some degree victims of Mr. Venizelos's and Mr. Lloyd George's original miscalculations at Paris."