In early 730, Ashras' newly appointed successor Junayd ibn Abd al-Rahman al-Murri tried to reach the army, which was still encamped in the Bukhara oasis, he had to be escorted from Amul by 7,000 cavalry who were attacked on the way by the Türgesh and almost destroyed.[19][20] Although Bukhara was recovered by the Arabs at this time, either under Ashras or under Junayd, in the very next year the latter led the Khurasani army to disaster in the Battle of the Defile, an event which shattered the tenuous Arab control over what remained of their possessions in Transoxiana.[21][22] The Arabs were not able to recover their position until the governorship of Nasr ibn Sayyar, who in 739–741 managed to re-establish the Caliphate's authority up to Samarkand.[23]