After the battle between Henan and Hexi, Xiongnu not only suffered heavy losses in troops, but also lost two strategic places in the south of the desert-Henan and Hexi, which had a great impact on Xiongnu's military strategy and economy. After that, the main force of Xiongnu was forced to move to Mobei, where the natural conditions were relatively bad, and the strength contrast between Han and Hungary changed fundamentally.
Although the main force of Xiongnu has moved to Mobei area, Xiongnu has not stopped invading the border areas of Han Dynasty. In the autumn of 120 BC, the Huns sent tens of thousands of cavalry to attack Beiping and Dingxiang, killing thousands of officials. In order to completely eliminate the main force of Xiongnu, eliminate its threat to the border of Han Dynasty, and provide a stable living environment for the people on the border, in the spring of 1 19 BC, Emperor Wu of the Han Dynasty decided to take advantage of Xiongnu's psychology that the Han army could not defeat the desert, and went deep into Mobei to fight a decisive battle with Xiongnu.
In order to ensure the smooth progress of the Battle of Mobei, Emperor Wu of the Han Dynasty requisitioned a large number of military supplies from all over the country, mobilized100000 elite cavalry troops to directly fight against the Huns, used hundreds of thousands of infantry to transport them, and collected140000 horses from the people as reserves.
The original plan of the Han army was to set out from Dingxiang, and Huo Qubing led the whole army to the desert, looking for the main force of the Xiongnu Khan to fight a decisive battle. Before the departure of the army, it was learned from the Xiongnu prisoners that Khan had traveled eastward, so he changed the original plan and sent 50,000 cavalry from Wei Qing and Huo Qubing to the north from Dingxiang and Dai Jun respectively.
After hearing the news that the Han army was advancing northward, Zhi Yi Xie Khan accepted Zhao Xin's suggestion and moved all his family's belongings to the farther north, leaving only elite soldiers waiting for a decisive battle with the Han army in Mobei.
Wei Qing led the former general Li Guang, the left general Gongsun Ao, the right general Zhao and the rear general Cao Xiang with a total of 50,000 cavalry from Dingxiang to meet the Xiongnu Khan. Shortly after Wei Qing led the army out of Dingxiang, he learned the exact location of the Khan from Xiongnu prisoners. Wei Qing then merged Li Guang and the two departments, making them advance by the east road, covering the main force on the Xiongnu flank, while himself and Gong led the main force to fight the Xiongnu Khan head-on.
Wei Qing led the main force to the north, and joined forces with the main force of Xiongnu Khan. After more than a thousand miles north, he suddenly found that the main force of a slanting Khan was waiting ahead. Wei Qing then ordered to surround the camp with Wugang car (an armored personnel carrier with leather around the roof) to prevent the Xiongnu army from attacking; Five thousand cavalry were sent to attack the Huns. Xie Khan also led tens of thousands of cavalry to battle, and the two armies fought fiercely until dusk. At this time, there was a sudden gust of wind, and the two armies could not see each other clearly. Wei Qing took the opportunity to send troops from the left and right wings to surround the Xiongnu army. A slanting Khan saw that there were many Han troops in Mazhuang, and the soldiers were stronger than Ma Zhuang. Feeling that I couldn't win, I didn't dare to delay any longer, so I led hundreds of cavalry to break through from the northwest. The two armies fought fiercely until late at night, when Wei Qing learned that a slanting Khan had fled. So he immediately ordered the Qing soldiers to pursue overnight, and Wei Qing led the army to follow, and the besieged Xiongnu soldiers took the opportunity to flee everywhere. By dawn, the Han army had chased out more than 200 Li, but it didn't catch Xiechanyu. In this World War I, the Han army annihilated and captured more than 19,000 Huns.
Under the leadership of Huo Qubing, the ancient general, the Han army on the 50,000 East Road set out from Dai Jun to meet Xiongnu Zuo, and the right Beiping magistrate Lu Bu set out from right Beiping to cooperate with the main force. After Huo Qubing led the army out of Dai Jun, he ordered the whole army to go into battle lightly. Walking more than two thousand miles to the north, I met Xiongnu Zuo's army in the desert. After several fierce battles, he annihilated and captured more than 70,000 Xiongnu troops, captured Yi Zhixie Khan, a close minister, three Xiongnu Tuntou kings, and 83 generals, and killed Xiongnu Beichemao (Attila). Zuo and his generals abandoned their troops and fled, and the Han army chased them back to the vast sea.
The decisive battle of Mobei University was the largest and most decisive battle in the Sino-Hungarian War. In order to annihilate the main force of Xiongnu, Emperor Wu of the Han Dynasty used the national elite cavalry and mobilized hundreds of thousands of infantry to participate in the war. The scale of his campaign is unprecedented, which shows the great determination of Emperor Wu of the Han Dynasty to completely defeat the Huns and never suffer from border troubles.
In the decisive battle between the Han-Hungarian desert and Peking University, the Han army won a decisive victory, forcing the Xiongnu to continue to flee to the north, resulting in the situation that there was no Xiongnu Wang Ting in the south of the desert. After a long period of time, the Huns were no longer able to launch a large-scale invasion of the Central Plains, and the focus of the Sino-Hungarian War also shifted from the Central Plains to the Western Regions.