You don't allow other countries to come in and chop up a nation, it has never worked........ever.
Here is how it is all going to go down (IMO

):
The US will eventually pull out, when this happens Saudi Arabia and the House of Saud will then back the Sunni's in Iraq, at the same time Tehran will back the Shite groups in Iraq. This will lead to a HUGE Middle East war, oil prices will sky rocket (the US will form tighter bonds with Venezuela and Russia since the 'House of Bush' will be gone) and violence will hit epic proportions. Islamic terrorists will stop focusing on the 'West' and start focusing on their neighbors. Afghanistan will go by the way side as Pakistan threats to nuke anyone who comes near it. The US will realize that Tehran is only utilizing 10% of its oil reserves right now and start backing the Shites & Tehran. Turkey will pair up with different fractions of Iraq (similar to the side switching Italy did in WWII), anything to keep the Kurds at bay. At the end of the day it will be a WWIII but involving mainly middle eastern lands with the Western lands realizing there is nothing to gain until the fighting is over. When it finishes you will have two large Shite and Sunni areas that have divided. The US relations will be a whole lot different then they are now and there will be all kinds of new "allies".
Now I didn't even get into what Africa is going to do
BTW, the whole time this is happening Kim Jong will pass on to the next level and S.K and N.K will finally start to work it out.
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...now...back to the liquor.