Answer
The Abbasid Caliphate was an Islamic empire that was established in 750 CE and ruled over much of the Middle East, North Africa, and Central Asia. It reached its maximum extent under the rule of Al-Mutawakkil, who reigned from 847 to 861 CE. During Al-Mutawakkil's reign, the Abbasid Caliphate expanded to include areas such as Armenia, Azerbaijan, and Georgia.