In the first year of Guangde (763), the "Anshi Rebellion" finally ended in a compromise way, and at this point, the Tang Dynasty entered the middle and late Tang Dynasty.

Admittedly, the border town rebellion led by An Lushan did not end the history of the Tang Dynasty, but it plunged the Tang Dynasty into a period of decline for more than a century. The intermittent crisis has also become the most authentic portrayal of the Tang Dynasty after the "An Shi Rebellion". Then, what kind of crisis did the Tang Dynasty fall into after the Anshi Rebellion?

First of all, the end of the "An Shi Rebellion" was actually the result of compromise between the Tang Dynasty and the rebels. According to historical records: "An, the history of chaos in the world, until the disaster of Su Zong was slightly flat, both the monarch and the minister were lucky, so they divided the land of Hebei, paid traitors, and fostered evil, in order to become a disaster." This curse is the "three towns of Heshuo" in history, so that for more than a hundred years, the three towns have always existed in the framework of the Tang Dynasty in the form of separatism.

Of course, the "three towns of Heshuo" are only representatives of the forces of the buffer region in the middle and late Tang Dynasty. There are buffer towns everywhere in the middle.

In the process of "An Shi Rebellion", the system of our time in the border towns of the Tang Dynasty was extended to the north and south of the great river because of the war.

During this period, the situation in the southern region is still relatively good. In the Tang Dynasty, observers were mainly appointed, and officials were mainly "Confucian and handsome". On the other hand, the buffer towns north of the Yangtze River were the focus of the Tang Dynasty.

This is because the buffer regions in the border areas need to deal with the invasion of Tubo, and the buffer regions in the Central Plains are an important force to contain the buffer regions of Heshuo in the Tang Dynasty.

It was these forces that entrenched themselves in the vast northern areas, which caused the Tang Dynasty to fall into a great crisis after the "An Shi Rebellion". The first is the "Heshuo three towns" separatist regime. As we all know, during the Tianbao period of the Tang Dynasty, Heshuo area was an important population gathering place in the Tang Dynasty and also an important tax source in the Tang Dynasty.

It was under such circumstances that the separatist regime of the three towns made the Tang Dynasty lose the tax source in this area, which indirectly led to the fact that the finance of the Tang Dynasty could only rely on the southeast region. This single tax structure undoubtedly laid the groundwork for the decline after the Tang Dynasty.

At the same time, the buffer towns in the Central Plains and the border areas also plunged the Tang Dynasty into a huge crisis. This crisis lies in the fact that the most striking feature of our time in the buffer zone is the gathering of soldiers all year round.

Historically, after the "An Shi Rebellion", the Tang Dynasty still possessed enormous military power, which mainly came from the former dynasties and frontier areas.

Among them, the central plains buffer region is mainly to fight against Heshuo buffer region, while the frontier buffer region is mainly to prevent Tubo. Under such circumstances, it led to Enemy at the Gates all the year round in the Tang Dynasty.

The harm of gathering troops all the year round is mainly reflected in two aspects, one is finance, and the other is control. First of all, in terms of finance, the situation of gathering soldiers all the year round makes almost all the taxes collected by the buffer region be used for military expenses; For the border towns with underdeveloped economy and agriculture, such as Jingyuan and Shuofang, it is impossible to support the huge military expenditure only by relying on local taxes, which makes it necessary for the Tang Dynasty to feed back these towns. In this case, the finance of the Tang Dynasty was even more difficult to make ends meet.

Secondly, in terms of control, the existence of our governor made the control of local areas in the Tang Dynasty easily affected. This is because we are heavily armed in the buffer region; During this period, although there were eunuchs supervising the army, the control of the local government by the imperial court would be affected by many reasons such as the weakening of imperial power.

For example, Tang Wuzong's rebellion in Zhao Yi Town was actually the result of the weakening of imperial power. In this case, in the process of appointing Chinese envoys, most of the Tang Dynasty used civilian officials instead of military commanders to rule a place, which avoided the disaster of buffer regions to some extent.

However, when the "Huang Chao Rebellion" broke out, many generals used military force to take over the soldiers of the buffer region, which made the buffer region out of control in the Tang Dynasty after the "Huang Chao Rebellion".

In a word, the separatist regime of the buffer region after the Anshi Rebellion plunged the Tang Dynasty into a great crisis, and the reason why this situation lasted for a hundred years was that the middle and late Tang Dynasty maintained a delicate balance.

Once this point is broken, it will make the Tang Dynasty fall into a state of perdition.