A military action consisting of armed forces of one geopolitical entity entering territory controlled by another such entity, generally with the objective of conquering territory or altering the established government.

plural of invasion

(uncountable) The condition of being invasive / (countable) The degree to which something is invasive

The condition of being invasible

(biology) Capable of being invaded by invasive species

In an invasive manner.

plural of invasive

The quality of being invasive

Of or pertaining to invasion; offensive. / (military, also figuratively) That invades a foreign country using military force; also, militarily aggressive.

(biology) An invasive organism, such as an animal or plant.