Didn't Wei Qing and Xiao Huo beat the Huns away?

It's not a fight, it's just that they can't harass the big man. Indiana Jones came and went without a trace, and it is difficult to completely annihilate it. Therefore, Han people can only kill as many people as possible when they fight nomads. After killing almost, they are naturally unable to fight again and invade the border. But don't forget that people are very fertile. Generally, after 20 years, or even worse, after 30 to 30 years, the population of nomadic people will continue to recover, and then the Han people will continue to fight ... This is the cycle. When the national strength of the Han nationality is strong, it is also possible. If the national strength is poor, such as in the late Jin Dynasty, the Han nationality completely lost its fighting capacity. Next, five random China. For example, in the late Southern Song Dynasty and the late Yuan Dynasty. ...