New Waves of Nomadic Invasions and the End of the Caliphate
•In the early 13th century central Asian nomadic invaders, the Mongols, threatened Islamic lands.
•Chinggis Khan destroyed the Turkic-Persian kingdoms east of Baghdad.
•His grandson, Hulegu, continued the assault.
•The last Abbasid ruler was killed when Baghdad fell in 1258.
•The once great Abbasid capital became an unimportant backwater in the Muslim world.