A very rough estimate of the total of Ottoman Assyrian dead as a result of massacre before and after April–May 1915, and of wartime starvation and the conditions of flight, might be in the region of 20,000–30,000, to which should be added perhaps 7,000 Persian Assyrians.
Donald Bloxham, The Great Game of Genocide: Imperialism, Nationalism, and the Destruction of the Ottoman Armenians (2006), p. 98.