The Greek genocide (, ), which included the Pontic genocide, was the systematic killing of the Christian Ottoman Greek population of Anatolia which was carried out mainly during World War I and its aftermath (1914–1922) on the basis of their religion and ethnicity. It was perpetrated by the government of the Ottoman Empire led by the Three Pashas and by the Government of the Grand National Assembly led by Mustafa Kemal Atatürk, against the indigenous Greek population of the Empire. The genocide included massacres, forced deportations involving death marches through the Syrian Desert, expulsions, summary executions, and the destruction of Eastern Orthodox cultural, historical, and religious monuments. Several hundred thousand Ottoman Greeks died during this period. Most of the refugees and survivors fled to Greece (adding over a quarter to the prior population of Greece). Some, especially those in Eastern provinces, took refuge in the neighbouring Russian Empire. By late 1922, most of the Greeks of Asia Minor had either fled or had been killed. Those remaining were transferred to Greece under the terms of the later 1923 population exchange between Greece and Turkey, which formalized the exodus and barred the return of the refugees. Other ethnic groups were similarly attacked by the Ottoman Empire during this period, including Assyrians and Armenians, and some scholars and organizations have recognized these events as part of the same genocidal policy. The Allies of World War I condemned the Ottoman government–sponsored massacres. In 2007, the International Association of Genocide Scholars passed a resolution recognising the Ottoman campaign against its Christian minorities, including the Greeks, as genocide. Some other organisations have also passed resolutions recognising the Ottoman campaign against these Christian minorities as genocide, as have the national legislatures of Greece, Cyprus, the United States, Sweden, Armenia, the Netherlands, Germany, Austria and the Czech Republic. Background At the outbreak of World War I, Asia Minor was ethnically diverse, its population included Turks and Azeris, as well as groups that had inhabited the region prior to the Ottoman conquest, including Pontic Greeks, Caucasus Greeks, Cappadocian Greeks, Armenians, Kurds, Zazas, Georgians, Circassians, Assyrians, Jews, and Laz people. Among the causes of the Turkish campaign against the Greek-speaking Christian population was a fear that they would welcome liberation by the Ottoman Empire's enemies, and a belief among some Turks that to form a modern country in the era of nationalism it was necessary to purge from their