That's just it. If the engagement is unrelated to our national interests , then it is a noble one. However, if there is some correlation between military action and our national interests, then that is greedy, selfish, imperialist, and EVIL. The only military engagements that are to be permitted are those that have nothing to do with our national interests.
Speaking of EVIL, get a brown bag for this one.
Hillary speaking to Code Pink re: Saddam, war, WMD
(you'll want to fast forward a bit... trust me, and turn up the audio)
http://www.youtube.com/watch?v=pYATbsu2cP8&eurl=