 Qara Yusuf's death in 1420 left his sons Ispend bin Yusuf, Iskander, Jahan Shah and Abu Said fighting over the succession.The Sa’dlu tribe, one of the main sub-tribes of the Kara Koyunlu, declared Ispend who was in Chokhur-e Sa'd province at that time as their new chief.Abu Sa’id had to flee and Jahan Shah went to Baghdad.