. "Arab\u2013Khazar wars"@en . . "The Arab\u2013Khazar wars were a series of conflicts fought between the armies of the Khazar Khaganate and the Umayyad Caliphate (as well as its Abbasid successor) and their respective vassals. Historians usually distinguish two major periods of conflict, the First (\u0441a. 642\u2013652) and Second (ca."@en . . . . . . . . . . . "KhazarKhaganate" . "Umayyad Caliphate(and laterAbbasid Caliphate)" . . . . . .