Sure, expand the military. But that's not going to fix things in Iraq anytime soon. As stressful as it is on the troops going over there again and again, I would extend rotations to maintain relationships with the local populace. Personal relationships built up over time with locals is a good part of what's needed.
Expand rotations?!
You're kidding, right?
Current rotations are 12+ months and the down-times are getting shorter. Iraqi's don't give a damn about "personal" relationships with soldiers, they want to make sure that the US is there for the long-haul and burning through units and soldiers is gonna end that as surely as anything.