他们正计划对这个国家的北部发动一场入侵。

They were planning to mount an ___invasion of the north of the country.

我们参观了历史遗址，以了解维京人入侵的遗迹。

We visited historical sites to see the remains of the Viking ___invasions.

这次军事入侵遭到了当地民众的强烈抵抗。

The military ___invasion was met with strong resistance from the local population.