What happened to the aliens after the Tang Dynasty? Why can't Han people beat aliens?

In the late Tang Dynasty, there were many foreign officers and men in the Tang army, some even generals of the First Army, and the main fighting force in the Tang army was the Hu people. The phenomenon of "five carelessness" appeared after the Tang Dynasty, which was actually directly related to Tang Jun's appointment of foreigners.

The reason why the fighting capacity of the Han nationality will decline is also because there is not enough fighting capacity. For example, the saddle used by the conference semifinals and the saddle used by Gao Qiao are all indispensable equipment for cavalry with strong fighting capacity. It was precisely because the Han nationality at that time was not good at riding and shooting that the combat effectiveness was obviously different from that of other nationalities. For nomadic people, because they have lived on horseback all their lives, with some well-equipped saddles, the fighting capacity of Hu people will obviously increase a lot. At the same time, for cavalry, it can attack day and night, which makes the advantage more obvious for Han infantry.

It is difficult for the Han people to face the cavalry of the Hu people. After all, I don't know when the cavalry will come, so I can only send a large number of soldiers to defend it closely. The huge expenditure of the army has increased the burden on farmers, so peasant uprisings often occur. Cavalry are generally good at surprise attacks, so after the cavalry breaks through a place, the troops behind will attack directly.

For nomads, being strong is not just robbing money. After the nomadic people have strengthened their own strength, they will also want to expand their territory and then establish their own political power. Therefore, when the military strength of the Ming Dynasty only depended on the conference semifinals, there would be rebellion.

In the Tang dynasty, because envoys were set up at the border, the envoys at that time had rights, equivalent to the later vassal kings. So when they are armed and powerful, some of them will rebel after combining their own strength. At the same time, in the Tang dynasty, civilization was suppressed because of the transfer of cultural center, so the conference semifinals, as the main force at that time, naturally betrayed.