Tughlugh Timur
Buyan Suldus' refusal to enforce his authority, as well as a continuing state of chaos within the Chagatai "ulus", led to the Khan of Moghulistan, Tughlugh Timur, to invade in 1360. Most of the Chagatai leaders did not oppose the invasion; many of them took the opportunity to pillage each other's lands. The Yasa'ur Hajji Mahmudshah, whose tribe bordered the Barlas, decided to raid their territory with a Moghul army. Hajji Beg decided at first to resist, but seeing that the Moghuls were much stronger, he fled to Khorasan.