sentences:  The majority of the Assyrians affected by the massacres were adherents of the Church of the East (often dubbed Nestorian), who originally inhabited the mountainous Hakkari and Barwari regions covering parts of the modern provinces of Hakkâri, Şırnak and Van in Turkey and Dohuk Governorate in Iraq, with a population ranging between 75,000 and 150,000.Most of these Assyrians were massacred during the 1915 Assyrian Genocide, at the hands of the Ottoman Turks.The rest endured two winter marches to Urmia in 1915 and to Hamadan in 1918.