I think you're ignoring the context of my comment.
The USA entered alright, but the common meaning of invade is
> (of an armed force) enter (a country or region) so as to subjugate or occupy it.
and subjugate in turn:
> bring under domination or control, especially by conquest.
American did not intend to annihilate Afghans, nor the Vietnamese.
> I don't see the point of this line of questions
That the resistance you describe depends on the behaviour of the aggressor. Could the Japanese resist the atomic bomb? Could German Jews peacefully/non-violently resist the Nazi regime?
The USA entered alright, but the common meaning of invade is
> (of an armed force) enter (a country or region) so as to subjugate or occupy it.
and subjugate in turn:
> bring under domination or control, especially by conquest.
American did not intend to annihilate Afghans, nor the Vietnamese.
> I don't see the point of this line of questions
That the resistance you describe depends on the behaviour of the aggressor. Could the Japanese resist the atomic bomb? Could German Jews peacefully/non-violently resist the Nazi regime?