One thing I was wondering is at what point is invading another country pre-emptively in respect to what they may or may not do to another country or for different ideals, a good thing.
If for example there is a civil war between two ethnic divisions in a country, ought that be a good enough reason to invade? If there is an uprising against a leader, ought that too be a good enough reason to invade? If there is Weapons of Mass Destruction intel that gets proved incorrect, is that good enough reason to stay once invaded?
I am not trying to be a smart-arse and The Americans, Australians and Brits all have had a hand at such acts. I say at what point is it better simply allowing a country to sort out its own problems as bad as they may be or as different as we may view things from them?