"Let That Fire Burn"

"I would not leave the region. I would not even threaten to leave the region. The idea that by threatening to leave the region will cause the political players to become sufficiently frightened that they will get their act together politically—I don’t necessarily believe that. I would stay in the region because we cannot afford this to become a regional conflict, but we might need to back away from the center of the conflict and let that fire burn, while keeping our troops in the north and perhaps on the southern border. And there is much that we can do, to keep both Iran and their Sunni neighbors from coming in massively to augment that conflict between the Shi‘a and the Sunnis. To let the fire burn in the center—this is an Arab conflict; it’s not Kurdish conflict; it’s an Arab-Sunni-Shi‘a conflict—and let conflict burn itself out," - General Charles G. Boyd, National Interest.

That's pretty much where I've come out on this. Get to Kurdistan and the borders and let them have their civil war. We can even exploit it for our own purposes, if we get smart enough.