Xiongnu in the north has always been the biggest threat to the Central Plains. When the Han Dynasty was just established, Xiongnu Modu once trapped Liu Bang on the Deng Bai in Pingcheng, which almost killed Liu Bang. From that time, Liu Bang realized that due to years of war, it was not the time to get rid of the Xiongnu in the Central Plains, so he could only use the method of hiding his relatives, that is, sending money to the Xiongnu.
During the Qin Dynasty, Qin Shihuang asked General Meng Tian to lead a hundred thousand troops to guard the northern border, and ordered that nothing should be left. It was Meng Tian who led hundreds of warm-blooded soldiers and defended the security of the Central Plains. It was not until the collapse of the Qin border that the Xiongnu once again entered the north to harass.
Emperor Wu of the Han Dynasty inherited a powerful country and a powerful opponent from his father. For Emperor Wu of the Han Dynasty, the contradiction with Xiongnu is not only national hatred, but also family hatred. Emperor Wu of the Han Dynasty was an ambitious man since he was a child. He has a channel to open the Hexi Corridor to open cultural exchanges between the East and the West, because it is related to the political, economic and cultural changes of a country. He knew that if he wanted to realize his ambition, he had to defeat the Huns.
Therefore, in order to realize the prosperity of the country and realize the dream in his heart, Emperor Wu of the Han Dynasty was able to wash away the shame of the Huns' invasion of the Central Plains frontier for many years, carry forward the glory of the Chinese Han nation, make great achievements, and become one of the most accomplished emperors in the Han Dynasty. After 44 years of fighting with the Huns, he finally made the Huns submit to the feet of the great powers.