Why didn't the 550,000 Qin Dynasty, which conquered South Vietnam, return to China?

There are two short-lived dynasties in the history of China, one is the Qin Dynasty and the other is the Sui Dynasty. Although these two dynasties existed for a short time, their influence on China cannot be ignored. For example, the Qin dynasty was the first unified dynasty, and the Qin dynasty also unified weights and measures, with cars on the same track and books in the same language. In addition, the Qin Dynasty left behind huge projects such as the Great Wall and the Mausoleum of the First Qin Emperor.

When the Qin Dynasty perished, it seemed that the fighters of the Qin Dynasty who swept the six countries did not resist. Even Zhang Han's suppression of Xiang Yu's 300,000 troops was made up of some prisoners temporarily. Some people say that part of the real army of the Qin Dynasty was Meng Tian in the north, and then Meng Tian committed suicide. I don't know what happened to these troops. The other one was the 500,000 troops that Qin Shihuang sent to the south to reclaim land.

It was Zhao Tuo who led more than 500,000 troops in the south at that time. Why didn't Zhao Tuo lead 500,000 troops back to Korea? If you come back, you don't have to rewrite history. There are actually many reasons.

The first reason: it's a long way

Because Zhao Tuo is in the south of Nanling, far away from the mountains and highlands of Shaanxi. It is estimated that it will take another two months for the peasant uprising to spread to South Vietnam. So if Zhao Tuo immediately led the troops to save him, it would be three or four months later. Besides, these troops in South Vietnam are scattered all over the country, so it is not something you can do well in a day or two. At that time, Zhao Tuo had tens of thousands of troops at most.

The second reason: there is no military order.

There is no information in the historical records that many dissenting Confucian turned to Zhao Tuo for help. If there were no orders from the Emperor of Qin, you would be beheaded if you led your soldiers to Shaanxi. It is quite possible that there were no rollers in Zhao Tuo at that time. How can we transfer soldiers?

The third reason: these soldiers are not real soldiers.

"Historical Records" records that "the land of Lvliang in South Vietnam is slightly taken, and Guilin, Nanhai and Xiang Jun are set up; In order to settle the south, Qin Shihuang immigrated to the south with 500 thousand people guarding the Wuling crossing. These people are not real troops, so they have no fighting capacity. Even if you go, you will go for nothing.

The fourth reason: Zhao Tuo may not want to be emperor.

Zhao Tuo occupied the south at that time, and has formed a separatist force. Why did he go to the north to be diligent? Wouldn't it be nice to be emperor yourself? Later, Zhao Tuo really did the same, establishing Nanyue State and becoming the founding emperor himself. South Vietnam has existed for nearly a hundred years. Experienced five emperors, more than the emperors of the Qin Dynasty.