During the rule of this dynasty, the garrison cities of Merv and Sestan served as bases for expeditions into Central Asia and India respectively. An army of this dynasty attacked Atil in response to a loss at Marj Ardabil to 
During the rule of this dynasty, the garrison cities of Merv and Sestan served as bases for expeditions into Central Asia and India respectively. An army of this dynasty attacked Atil in response to a loss at Marj Ardabil to forces led by Barjik. This dynasty was defeated at Akroinon, though they were able to take Rhodes and Crete. This dynasty was victorious at Karbala over Husayn ibn Ali, while the use of lethal Greek fire prevented them from taking Constantinople. After the death of the last ruler of this dynasty at the Zab river, a small offshoot survived under Abd al Rahman in Cordoba. This ruling dynasty was defeated by Charles Martel at Tours, and its capital was at Damascus. For 10 points, name this Islamic caliphate, which was followed by the Abbasid dynasty.
During the rule of this dynasty, the garrison cities of Merv and Sestan served as bases for expeditions into Central Asia and India respectively.
Ummayad dynasty or caliphate