 At an early date the entire tribe moved out of Mongolia and eventually settled in the area comprising the "ulus" of Chagatai Khan.In the mid-14th century the authority of the Chagatai khans underwent a sudden decline.In the western part of the khanate (specifically Transoxiana and the bordering provinces), the khans had become rulers in name only, with real power in the hands of the local Turko-Mongol amirs after 1346.