You claim that it takes five to eleven years to defeat an insurgency and I think you may be right. Do you also think it's a great idea to rotate the same combat arms soldiers in and out of that theater, as well as lengthy call-ups for Reserve and Guard soldiers, without expanding the force? There are plans afoot to re-deploy soldiers before their 14 month off-rotation period is up.
Our mission now is boots on the ground and UAV/UCAVs aren't going to fit the bill.
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.