Western ( Ottoman ) Armenia consisted of six vilayets ( vilâyat-ı sitte ) - the vilayets of Erzurum , Van , Bitlis , Diyarbekir , Kharput , and Sivas .
Western ( Ottoman ) Armenia was composed of six vilayets ( vilâyat-ı sitte ) , the vilayets of Erzurum , Van , Bitlis , Diyarbekir , Kharput , and Sivas .