What do you mean by guarding the border?

Frontier defense group words: frontier defense, frontier defense forces.

The earliest frontier defense can be traced back to the Qin Dynasty. After the Qin dynasty unified the six countries, it launched a war against Baiyue area in Lingnan (now Guangdong and Guangxi) and set up counties to manage it.

Meng Tian was sent to launch a counterattack against the Huns and seized and controlled the Hetao area.

In order to consolidate the achievements of the new empire in these areas, Qin Shihuang sent personnel to settle in Lingnan area and Hetao area to defend the border. Most immigrants are soldiers, but there are also a few ordinary people and businessmen. The scale is very large, with 500,000 people in Lingnan alone, and more than 40 counties have been set up in Hetao area for resettlement.

Especially with the efforts of Ren Tao, the prefect of Lingnan in Qin Dynasty, and his successor Zhao Tuo, the military king of South Vietnam, the Lingnan area at that time quickly entered the feudal society from primitive tribal society, and achieved a leap-forward development, fully integrating into Chinese civilization.

Extended data:

After entering the Han Dynasty, stationing fields and guarding the border became a major part of the policy of the Han Dynasty, and it was handed down in the form of institutionalization, which was used in the later Tang, Ming and Qing Dynasties.

The settlement of wasteland in Han dynasty was mainly distributed in northwest, northern Xinjiang and northeast China. On the one hand, it solved the supply problem of troops, on the other hand, it also kept a considerable number of troops in the border areas, which played a very important role in the stability of the border areas. For example, in 6 1 year BC, Zhao Chongguo, a famous Western Han Dynasty, successfully quelled the rebellion of Western Qiang by using the stationing army.

References:

Baidu encyclopedia-guarding the border