What does it mean to defend while defending?

1, guarding the edge is guarding the edge.

2. Defending the border group words: Garrison the border.

Reclaiming land and guarding the border can be traced back to 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 county management.

4. Meng Tian was sent to launch a counterattack against Xiongnu, 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 of the immigrants are soldiers, and a small number of ordinary people and businessmen are large in scale. There are 500,000 people in Lingnan alone, and there are more than 40 counties in Hetao area.

6. 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.