 Soon after, other cities of Eastern Turkestan — Yarkant, Khotan, Aksu, and Uch Turpan — joined him, and recognized Sultan Said Khan as ruler, creating a union of six cities, called Altishahr.Sultan Said Khan's sudden success is considered to be contributed to by the dissatisfaction of the population with the tyrannical rule of Mirza Abu-Bakr and the unwillingness of the dughlat amirs to fight against a descendant of Chagatai Khan, deciding instead to bring the head of the slain ruler to Sultan Said Khan.This move put an end to almost 300 years of rule (nominal and actual) by the Dughlat Amirs in the cities of West Kashgaria (1219–1514).