The death of Timur led to more struggles, which resulted in Abu'l-Khayr Khan conquering several tribes and placing himself at the head of a new Uzbek Khanate. Other descendants of Genghis Khan had claims over the area, and so for most of the 16th and 17th centuries there was non stop feuding among these various parties for power over the Kazakh steppe and the Syr Darya valley, especially between the Kazakh Khanate and Dzungar feudal lords. Even so, a degree of stability was maintained in Otrar up until the Dzungars arrived in Kazakhstan.