In the early Ming Dynasty, the "restriction policy" was implemented against Mongolian Oara, and horse markets were opened in Xuanhua and Datong to facilitate mutual trade. In the 14th year of Zhengtong (1449), 2,000 people were first sent to enter the horse, falsely claiming 3,000 to receive food. The eunuch Wang Zhen cut the price of Wala tribute horses, which angered Wala and became the trigger of the war. In July, Wala divided four groups to attack the Ming Dynasty, and also attacked Datong first. The Ming army's defeat spread to the capital, and the government and the public were shocked. Zhu Qizhen, Emperor Yingzong of the Ming Dynasty, was bewitched and hijacked by Wang Zhen. He led a personal expedition and led an army of 500,000 people into Datong. Guo Jing, the eunuch guarding Datong, confessed the enemy's situation to Wang Zhen. Wang Zhen was frightened and decided to fight. Guo Dengjin, the minister of the capital of Datong, said: "If you return to Beijing via Zijingguan, you will be safe." Wang Zhen wanted to take the opportunity to make Yingzong happy with his family so that he could show off his hometown, so he left Zijingguan and headed for Yu County. On the way, Wang Zhen was afraid that the army would destroy his crops, so after traveling 40 miles, he turned east and changed the route to Xuanhua, thus delaying the time. After arriving in Xuanhua on the 10th, Wala's pursuers arrived. Gongshun Hou Wu Kezhong and his younger brother were killed in the battle, and the troops were defeated. Zhu Yong, Duke of Chengguo, led 50,000 cavalry reinforcements. They were ambushed by the enemy at Yao'er Ridge and the entire army was wiped out. On August 14th, Yingzong arrived at Tumubao (today's east of Huailai County, Hebei Province). The Ola soldiers surrounded the fort, and the waterways were also occupied by the Yexian army. The Ming soldiers and horses were hungry and thirsty, so they all ordered to resist the enemy all night. increase. On the 15th, he also pretended to send envoys to seek peace. When Wang Zhen saw the Wala soldiers retreating, he ordered the barracks to be moved to a place near the water. As soon as the army moved, he concentrated his cavalry and rushed from all directions. The Ming soldiers tried to escape and the formation collapsed. Yingzong was captured, Wang Zhen and others died in the rebellion, and more than 100,000 officers and soldiers were killed or injured.