the second son of Genghis Khan.
He was Khan of the Chagatai Khanate from 1226-1242 C.E. The Chagatai language and Chagatai Turks take their names from him. He inherited most of what are now the five Central Asian states after the death of his father. He was also appointed by Genghis Khan to oversee the execution of the Yassa, the written code of law created by Genghis Khan, though that lasted only until Genghis Khan was crowned Khan of the Mongol Empire. The Empire later came to be known as the Chagatai Khanate, a descendant empire of the Mongol Empire. Chagatai Khan was considered hot-headed and somewhat temperamental by his relatives, because of his attitude of non-acceptance of Jochi as Great Khan. He was the most vocal about this issue among his relations. Chaghatai himself appears to have been a just and energetic governor, though perhaps rough and uncouth, and addicted to hard drinking. At any rate, he was animated by the soldier-like spirit of his father, and succeeded in keeping order among as heterogeneous a population, as a kingdom was ever composed of