Sultan Said Khan
Around 1500, Muhammad Shaybani attacked Ahmad's brother Mahmud Khan, who appealed to Ahmad for help. Muhammad defeated both Ahmad and Mahmud, seizing Tashkent and Sairam. Ahmad was captured but released soon after. He died of paralysis in Aksu a year later. His brother Mansur Khan succeeded him. His reign began with difficulties with the powerful Dughlat of Kashgar, Mirza Abu Bakr Dughlat, plundering the cities of Kucha and Aksu. In 1514, Mansur's brother Sultan Said Khan captured Kashgar, Yarkand, and Khotan from Abu Bakr and forced him to flee to Ladakh. This marked the final separation of Moghulistan into two realms, with Said situated in Kashgar, and Mansur in Turpan, otherwise known as Uyghuristan.