Qutayba ibn Muslim
Part of this region was conquered by Qutayba ibn Muslim between 706 and 715 and loosely held by the Umayyads from 715 to 738. The conquest was consolidated by Nasr ibn Sayyar between 738 and 740, and continued under the control of the Umayyads until 750, when it was replaced by the Abbasids. The Tang dynasty also controlled the eastern part of the region until about the same time, when a civil war known as the An Lushan Rebellion occurred.