After Liu Che, Emperor Wu of the Han Dynasty, ascended the throne, he decided to abolish the humiliating policy of peace and proximity and instead carry out military strikes against the Xiongnu. To this end, Emperor Wu of the Han Dynasty made active arrangements and arrangements: appointed Li Guang and other famous generals to lead troops to guard the border county fortresses, recruited soldiers to consolidate the border defense, and at the same time took measures to encourage horse breeding. Emperor Wu of the former Han Dynasty sent Zhang Qian to the Western Regions for the first time, hoping to unite with the Dayue clan and flank the Xiongnu. Through a series of economic, military, and diplomatic efforts, the conditions for the Western Han Dynasty to resist the invasion of the Xiongnu were ripe.

The Xiongnu sent envoys to Emperor Wu of the Han Dynasty to ask for peace, and Emperor Wu of the Han Dynasty ordered his ministers to discuss countermeasures. Daxing ordered Wang Hui to advise Emperor Wu of Han to refuse peace on the grounds that the Xiongnu had repeatedly reneged on the alliance, while Han Anguo persuaded Emperor Wu of Han to accept peace on the grounds that the Xiongnu soldiers were strong and strong, and most of the ministers agreed with Han Anguo's view. Emperor Wu of the Han Dynasty finally adopted Han Anguo's suggestion and made peace with the Xiongnu.

Nie Yi, a wealthy gentleman of Yanmen, suggested to Emperor Wu of the Han Dynasty through Wang Hui: The Xiongnu had just made peace with the Western Han Dynasty and trusted the residents of the border very much, so they could use their wealth to lure the Xiongnu to send troops and annihilate the main force of the Xiongnu. Emperor Wu of the Han Dynasty adopted Wang Hui's suggestion, sent 300,000 elite soldiers, and appointed the guard captain Li Guang as the general of the cavalry, the servant Gongsun He as the general of the light car, and the imperial historian Han Anguo as the general of the guard, and led the main force to ambush in the valley near Yanmen. He also appointed Daxing Ling Wang Hui as the general of the general, and Li Xi, the doctor of Taizhong, as the general of the material officer, and led 30,000 troops to set out from Daijun, attacking the Xiongnu's baggage from the flank and cutting off its retreat, preparing to annihilate the main force of the Xiongnu in one fell swoop. At the same time, Emperor Wu of the Han Dynasty sent Nie Yi as an internal response to the Xiongnu to lure the enemy.

Nie Yi went out of the fortress to do business in the name of seeing the Xiongnu military minister Shan Yu. Nie Yi deceived Shan Yu and said that he had hundreds of people under his command, who could kill the officials of Yanmen, and then surrender the city, and the livestock and property in Yanmen City could be returned to the Xiongnu, but the Xiongnu must send a large army to meet them in case of Han soldiers. The military ministers are only greedy for the property of Yanmen, and they are pro-rated

An army of 100,000 entered Wuzhou and sent envoys to enter with Nie Yi first, and then marched after killing the officials. Nie Yi then returned, conspired with the Yanmen County Commander, killed the prisoners, cut off their heads, hung them above the city gates, disguised as the heads of officials, and deceived the Xiongnu envoys. After receiving the envoy's report, the military minister Shan Yu led the army to march in the direction of Yanmen. When the army came to a place more than 100 miles away from Yanmen, they found that there were livestock along the way, but no one was grazing, which aroused the suspicion of the military minister Shan Yu. At this time, the Xiongnu discovered and captured a small border pavilion of the Han army and captured the Han Yanmen Captain Shi. Wei Shi told all the plans of the Han army under the threat, and the military minister Shan Yu was shocked after hearing it, and then he was overjoyed, and said: "I got the time that Wei Shi is not the son of the Han Dynasty, it is really a gift from God." So he named Wei Shi the "King of Heaven" and ordered the immediate withdrawal of the army.

The 30,000 troops led by Wang Hui and Li Xi set out from Daijun,

The baggage that was preparing to attack the Xiongnu was very surprised after learning the news of the Xiongnu's retreat. Wang Hui thought that his army could not match the Xiongnu army, so he had to retreat. Han Anguo and others led a large army to ambush in Yanmen, but there was no movement for several days, so they changed the original battle plan and led the army to attack, but the result was nothing

Long Hui and the others learned that Long He had died in battle and more than 30,000 soldiers had died in battle, and immediately sent out 10,000 Queensland aborigines in Feixin, holding Australian swords and sticks 80 centimeters long and weighing 1.1 kilograms, and equipped with Warring States bronze swords. 10,000 North American soldiers held a North American short stick, 50 centimeters long and 0.5 kilograms, and were equipped with Warring States bronze sticks and Warring States wooden shields. 10,000 Australian aboriginal militiamen held Australian hockey sticks 90 cm long and 0.5 kg in weight, and were equipped with Warring States bronze pecking hammers with slender blades, mainly used for pecking. 30,000 people. Yingbu led the 6th Army with 10,000 men armed with Spring and Autumn maces and American waist axes and the 8th Army that fled back, and the 15th Army was armed with elbow throwing sticks, Conde tomahawks and infantry companies. A total of 60,000 chariots and 4,000 chariots went to capture Shangjun.

At this moment, in order to fight against the Xiongnu, Emperor Wu of the Han Dynasty ordered Zhou Yafu to lead his troops to withdraw from Shangjun, and Yingbu's army was stationed in Shangjun, and Long Hui ordered Yingbu to temporarily prepare to defend the city.

Zuo Xian's royal army invaded Shanggu and Yuyang. Han Anguo, the general of the Han Caiguan, led 1,700 men to battle, was wounded and defeated, and retreated to the barrier.

Emperor Wu of the Han Dynasty Liu Che ordered Han An's troops to move eastward to Youbeiping to block the Xiongnu from advancing to the east, and at the same time ordered the cavalry general Wei Qing and the general Li Xi to quickly send troops to Yunzhong to raid Henan, where the Xiongnu defense was weak. After Wei Qing and Li Xi led their troops out of the fortress, they outflanked them from the clouds to the west, and suddenly attacked the Xiongnu Aries King and the Loufu King and defeated them in one fell swoop. In the battle, the Han army annihilated thousands of enemies, captured 3,071 people and more than 100,000 cattle and sheep, recovered all the land in Henan, and traveled more than 1,000 miles to Longxi.