Meanwhile, in Transoxiana the Qara'unas lost their status as de facto leaders of the Chagatai ulus; they were replaced by Buyan Suldus, an easygoing and ineffective amir. Tughlugh Timur judged that he would face little resistance in Transoxiana and invaded in March 1360. As predicted, most of the tribal amirs declared their support for him; those that didn't (notably Hajji Beg of the Barlas tribe) decided to flee. The Moghuls decided to find someone else to administer Hajji Beg's former territories; they agreed on Hajji Beg's young nephew Timur, who had submitted to them. This, incidentally, was the first step in Timur's rise to power as amir of the Timurid Empire.