In the eighth year of the Ming Dynasty, Ming Taizu marched northward, Tatar declined, and Vara took the opportunity to go south. In ten years, Tatar Benya was attacked and killed, and then he went south to attack Ming. In the twelfth year, Ming Taizu, the ancestor of the Emperor, marched to the north to Vara and reached tuul river (now the Duerhe River in the Mongolian People's Republic). The following year, Mahamu and other Gongma apologized. Soon Mahamu died and his son left. In the ninth year of Xuande (1434), Yi Tuo attacked and killed Arutai, the Tatar Department, and at the beginning of orthodoxy, Xian Yi and Anle were killed, thus unifying the Mongolian Empire. He asked the descendants of the Yuan royal family to pick flowers and become Khan, and he became the prime minister himself. Orthodox four years (1439), when he died, his son was also the first heir, and he was called Wang Huai. At this point, the Walla forces are extremely prosperous. In the fourteenth year of orthodoxy, the Ming Dynasty was first attacked on a large scale. Eunuch Wang Zhen was defeated by the civil fort, and Ming Yingzong was captured (see the change of the civil fort). He also directly attacked the capital, but was defeated by Yu Qian, so he had to make peace with Ming and return to Yingzong. Since then, the contradiction between Tuotuo Buhua and Tuotuo Buhua has intensified. First, relying on the strong, he killed Hua and took his place, becoming increasingly arrogant. Jingtai was killed in the sixth year (1455).