They invaded our country.

They fortified the fortress in preparation for the enemy's invasion.

The enemy's army invaded our country.

He obtained that position by using force.

He was arrested for committing a criminal act.

He thought deeply about the result of that juristic act.

He is still a minor, so he does not have full capacity to act.

He avoided talking about actual sex acts with her.

His propaganda of the deed influenced many people.

Your actions are a clear case of copyright infringement.