We didn't invade Vietnam. We were aiding the southern part of Vietnam against the northern part.

Now, Vietnamese will probably tell you otherwise. My co-worker is Vietnamese, and from their perspective we WERE not only invading, but insulting them. They consider Ho Chi Min to be a hero, where we consider him to be a Vilain.

But, for the most part, we've never invaded another country, especially to the extent we have with Iraq. We've completely ruined Iraq, and now we're trying to fix what we fucked up.