Ahnaf stayed at Merv and waited for reinforcement from Kufa.[2] Meanwhile, Yazdegerd had also gathered considerable power at Balkh and also sought alliance with the Khan of Farghana, who personally led the Turkish contingent to help Yazdegerd III. Umar ordered that Yazdegerd’s allied forces should be weakened by breaking up the alliance with the Turks. Ahnaf successfully broke up the alliance and the Khan of Farghana pulled back his forces, realizing that fighting with the Muslims was not a good idea and might endanger his own kingdom.