In the first two years of the han Xuan Emperor's reign, the Xiongnu at that time suffered a double blow of natural disasters and the Wusun kingdom, and his Right Gu Li tribe was almost completely destroyed, and other tribes also fled for their lives in the snowstorm, and the corpses were all over the field, at this time the Xiongnu economy and population suffered an unprecedented blow. Many Han Dynasty ministers proposed to take advantage of his illness to kill him, but at this time, the later general Zhao Chongguo felt that the Han Dynasty and the Xiongnu were far apart from the desert, and even if they sent troops on expeditions again, the effect was minimal.
Instead of personally attacking the Xiongnu, it was better to launch the Northern Hu clan to attack the Xiongnu, and the Han Dynasty could reap the benefits of the fishermen, and Emperor Xuan of Han accepted his suggestion, so he began a vigorous battle to divide and disintegrate the Xiongnu. First of all, the Han Dynasty would economically blockade and suppress the Xiongnu in an all-round way, unite the northern ethnic groups and the countries in the western region to prohibit the sale of grain and salt and iron to the Xiongnu, and resolutely not give the Xiongnu time to recover.
Secondly, the Han Dynasty spread widely throughout the world, and allied with the Wusun kingdom in the west, the Wuhuan in the east, and the Dingzhi ethnic group in the north, and simultaneously carried out military strikes against the Xiongnu from the three directions of the northeast and the west, and completely solved the scourge of the Xiongnu. This strategy really worked, and soon after, Shan Yu of the Xiongnu personally went out on horseback and led tens of thousands of cavalry to attack Wusun again, hoping to avenge the snow and revenge and grab grain for the winter.
Wusun retreated, to avoid its sharp edge, it was winter, the weather was severe, the Xiongnu as a party to the attack, very unfavorable, had to withdraw their troops to return to China, but did not expect to be attacked by a blizzard on the way back to China, the Steps and livestock of the Xiongnu froze to death, returning to the north of the desert less than 1/10 of the people and livestock.
Although the Xiongnu were destroyed several times this time, but a race could not be so disappeared, after many years of recuperation, the Xiongnu attacked again, and at that time the prime minister thought that the Xiongnu had not sent troops for a long time, if this time the Han Dynasty sent troops, it would be unkind and unjust, Zhao Chongguo was angry after hearing this sentence, before the Xiongnu repeatedly suffered natural disasters and man-made disasters, it was already very weak, and now the Han Dynasty Zhaoxuan Zhongxing, when it was extremely prosperous, it was completely able to withstand this battle, and the Western Regions were the last bite of cheese of the Xiongnu, If the Huns had no more tax revenues and would soon perish, how could they have abandoned the war now?
Emperor Xuan of Han did not listen to Zhao Chongguo's advice, but just made a neutralization, and the Xiongnu got the opportunity to recuperate, and when they came to attack again, Zhao Chongguo was already 78 years old, And Emperor Xuan of Han finally panicked at this time, hoping that Zhao Chongguo could help them again, but at that time, Zhao Chongguo lost his son, fell ill, and finished fighting the Qiang people, and this time he had to fight the Xiongnu again.
However, Zhao Chongguo gladly agreed, and at the age of 78, he led 40,000 cavalry north to fight against the Xiongnu. 40,000 elite soldiers were lined up in the west, confronting more than 100,000 Xiongnu troops, and there were more than 100,000 troops in total, but they did not dare to provoke the Han, and they fell seriously ill in one breath, and Zhao Chongguo also did not spend a single soldier and pawn, and finally destroyed the Xiongnu.