"Dughlat" emirs had ruled the country that lay south of Tangri-Tagh in the Tarim Basin from the middle of the thirteenth century, on behalf of Chagatai Khan and his descendants, as their satellites. The first "dughlat" ruler, who received lands directly from the hands of Chagatai, was amir "Babdagan" or "Tarkhan". The capital of the emirate was Kashgar, and the country was known as "Mamlakati Kashgar". Although the emirate, representing the settled lands of Eastern Turkestan, was formally under the rule of the moghul khans, the "dughlat" emirs often tried to put an end to that dependence, and raised frequent rebellions, one of which resulted in the separation of Kashgar from Moghulistan for almost 15 years (1416–1435).