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As the Ottoman Turkish Empire entered a permanent phase of decline in the late 17th century it was engaged in a protracted state of conflict loosing territories both in Europe and the Caucasus. The victors were the Christian States the old Habsburg and Romanov Empires and the new nation states of Greece, Serbia, Romania and Bulgaria.
Justin McCarty estimates that between 1821 and 1922 around five and a half million Muslims were driven out of Europe and five million more were killed or died of disease and starvation while fleeing. Cleansing occurred as a result of the Serbian and Greek independence in the 1820s and 1830s, the Russo-Turkish War 1877-1878, and culminating in the Balkan Wars 1912-1913. Mann describes these acts as “murderous ethnic cleansing on stupendous scale not previously seen in Europe” referring to the 1914 Carnegie Endowment report.
Atrocities
Some 30,000 Turks were killed in Tripolitsa by Greek rebels in the summer of 1821, including the entire Jewish population.
During the Russo-Turkish War it is estimated that up to 300,000 Turks were killed or perished and one million became refugees.
Massacres against Turks and Muslims during the Balkan Wars in the hands of Bulgarians, Greeks and Armenians are described in detail in the 1912 Carnegie Endowment report.