江山(jiāngshān)

本义指河流和山岭，代指一个国家的政权及其所覆盖的全部疆域(义同“河山”)。这种用法隐含着这样的观念：河流、山岭地形险要，是卫护国家安全、政权稳固的天然屏障;疆域是国家的构成要素。

Rivers and Mountains / Country or State Power
The term, similar in meaning to heshan (河山), literarily means rivers and mountains. It is used to refer to the sovereignty of a state and all its territory. The term has these implications: rivers and mountains provide natural barriers that protect the country and its sovereignty; territory is the key feature of a state.

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【引例】

割据江山，拓土万里。(《三国志·吴书·贺劭传》)

To seize a region by force, establish a regime there, and extend its territory far and wide. (The History of the Three Kingdoms)