 However, during the fighting between the Arabs and Sogdians, the Wardan Khudah was killed, which probably constituted a heavy blow to the Bukhara-Wardana alliance.Bukhara was shortly after captured by Qutayba, who imposed a tribute of 200,000 "dirhams", and installed an Arab garrison to secure against rebellion.During the same time, another Sogdian king named Tarkhun, who was the ruler of Samarkand, acknowledged the authority of the Umayyad Caliphate.