The Division of Countries Conquered by Genghis Khan Among His Sons
CHAGATAI ULUS AND THE STATE OF HAIDU According to Rashid ad-Din, Genghis Khan divided the countries he conquered among his sons in the spring of 1226. The eldest, Juchi, received lands from Koyalyga (a city in the Ili River valley) and Khorezm to the places where "the hooves of the Tatar horses reached," Chagatai — from the land of the Uighurs to Samarkand and Bukhara, Ogedei — the valleys of Emili and Bunak (i.e., Koyuk), and Tolui received the ancestral yurt. They were assigned