韃靼
(?
1408年～
1412年)
本雅失（？－1412年），尊號完者帖木兒汗，蒙古大汗，額勒伯的兒子。1402年，
本雅失的哥哥坤帖木兒被鬼力赤所殺，
本雅失投奔中亞帖木兒帝國，皈依伊斯蘭教。鬼力赤雖然奪得大汗的尊位，但他自稱韃靼可汗，廢除元朝的國號。他明朝示好、想得到明朝支持。這引起蒙古各部的不滿。1408年，蒙古大臣阿魯殺死鬼力赤，迎立
本雅失為大汗，1409年，殺害明朝使節郭驥，和明朝斷交。明成祖派大將丘福率軍10萬北，結果全軍覆沒。第二年，明成祖第一次親蒙古，率軍50萬，在斡難河（位於今蒙俄邊境）大敗
本雅失，之又擊敗阿魯。
本雅失率七騎逃察天台兄台汗國。1412年，
本雅失被瓦剌首領馬哈木殺死，瓦剌明朝稱臣。大汗空位，而忽必烈統結束，直到20年脫脫不花兄弟三人的出現。
Ya lost in the (? -1,412), The appellation End who Timur Khan, Mongolia Khan, the son of the amount of Le Boke. 1402, lost in the older brother of the Ya Kun Timur killed by red devil power, lost in this elegant defected Timur Empire in Central Asia, converted to Islam. Red Ghost Force won the sweat despite the respect bit, but he claimed Tatar Khan, the country abolished the Yuan Dynasty. Ming said he is good, want to support the Ming Dynasty. This caused dissatisfaction for Mongolia. 1408, Mongolian Minister Alu Tai Chi power to kill a ghost, Ying Li lost in the sweat of this elegant, 1409, killing of envoys Guo Ji Ming, and Ming broke off diplomatic relations. Envoys sent his troops 100 000 North Ciuffo general levy, the results annihilated. Secondly, the Yongle Emperor for the first time a personal expedition Mongolia, led his army 500,000, in turn Nan River (located in the border today Mongolia and Russia) defeated the AGB loss, the later beat Alu Tai. The Ya-loss rate of 7 riding in fled Chagatai Khanate. In 1412, lost in the Ya Wala leader Mahmud was killed, Wala vassal to Ming. Sweat space, and the end of Kublai system until 20 years after the Tuotuo not spend the emergence of three brothers.