What does "land reclamation" in Historical Records mean in classical Chinese?

There are two main explanations for "land opening":

[plow? That? Field]: Reclaim wasteland;

[Pioneer? That? Plunder or occupy land.

The word "land reclamation" in Historical Records is mainly the second interpretation, which is quite "land reclamation".

For example:

"Historical Records Qin Ben Fantasy": If you drive a thousand miles, you will dominate Xirong.

Shihou: Sean, from Liu Hou, is also a Korean. This great father opened this land to welcome Han Zhaohou, King Xuanhui and King Ai Xiang. Father Ping, Wang, mourn.

Preface to Historical Records Taishigong: Li Qin attacked Xiongnu in the north. Built by the river, it was built in Yuzhong because of the solid mountains.