I think that decisions should be made according to the situation, rather then according to principles. I don't know anywhere near enough about the situation in Iraq to know what the best course of action is atm.
What are the immediate goals of the American Armed Forces there? (apart from self defence)
If they do pull out and Iraq is only left with only enough home-grown forces to protect a few government buildings; what would then be the worst case scenario?
What would be the best case scenario after a withdrawal?
*edit* Conversely, what are the best and worst case scenarios if The USA continues the occupation?
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