Iraq is a sovereign country now. They can demolish the Sunni Triangle if they feel the need. We shouldn't.
Vietnam is a "recent initiative" to you?
What recent military action have we lost that is comparable to the scale of Vietnam burned in our memory?
With 72 hour notice, we will have a combination of terrorists and innocents leaving the area. The hard core terrorists will stay with their huge caches of weapons. I would envision a joint effort with Iraqi soldiers and officers and our allies.
The war would be over (and won) if we had done that a couple of years ago, or just after our contractors were burned and their bodies dragged through the streets. Would be helpful if we had real men instead of lawyers running this war, IMHO.