They gathered soldiers to fight the invading army.

他们召集士兵对抗入侵的军队。

《牛津词典》

They delivered their prisoner over to the invading army.

他们把俘虏交给了侵略军。

《牛津词典》

Bayin Naung was appointed commander-in-chief of the invading army in AD 1547.

公元1547年，勃应囊被任命为进军泰国的总指挥。

youdao

Well, what happens is one army is invading the land of the other.

好的,当一支军队侵入了对方的领土

耶鲁公开课 - 古希腊历史简介课程节选

It's believed that Moenjodaro had already fallen into economic decline when an invading army attacked, delivering the sudden fatal blow.

FORBES: Magazine Article

There is no question that, even after the incineration of its cities, Japan still had the capacity to inflict unacceptable losses upon an invading army.

ECONOMIST: Japanese history

Letting your personal revulsion at the bad things your government does deter you from voting is an error exactly analogous to the pacifist who refuses to take up arms when faced with a hostile invading army.

FORBES: The Case Against The Case Against Voting