How short term can it be if the Iraqi forces are still running away even when the odds are wildly in their favor?
Depends on which side we're going to help.
The Sunni IA is running away. There’re plenty of Shia IA who will not fraternize with the Sunni ISIL. Iraqi Shia have their own agenda and to them this heralds a time of Payback.
I don't know what weaponry the terrorists have, but all I've seen in reports is pickups probably with some 50 caliber machine guns and RPGs and small arms. One would think the Iraqis have enough weaponry to defeat them, but...