At this time, almost all of West Turkestan ("Maverannahr") was invaded by nomadic Uzbeks of Shaybani Khan, who were killing all the descendants of Timur the Great and Chagatai Khan. Sultan Said Khan saved his life when he moved to Kashgar with his nobles. In 1516, he concluded a peace agreement with his older brother Mansur Khan, the moghul khan of Chalish and Turpan ( Uyghurstan), who died in 1543. As a result, the eastern part of the settled country south and partly north of "Tangri-Tagh" joined his state, including the cities of Bai, Kucha, Chalish (Karashahr), Urum (Urumchi), Turpan, Kumul, and Shazhou (Dunhuang), representing those lands of former Uyghuria (856-1335) that were known as the Fifth Ulus of the Mongol Empire in the middle of the thirteenth century, because the former ruler of Uyghuria, "idikut" Baurchuk Art Tekin married Altun Begi, the daughter of Genghis Khan, and was declared by Genghis as his fifth son in 1211.