That's a tall order, but think about it, folks. First, there's the obvious psychological scare factor. Any army worth its salt is prepared to deal with normal-sized opponents. Now picture company upon company of them coming over a hill, armed to the teeth and lusting for blood. The rout in Iraq would pale in comparison.
Midgets are ideal for defensive positions, too.
First, smaller bodies mean smaller foxholes. That leads to more foxholes, more quickly. Should said foxholes get overrun, then midget forces could gain valuable consolidation time while the enemy has to spend time digging deeper trenches. For quick and easy insertion of special forces, midgets have everybody beat. It's a lot easier to be all sneaky-like when you're only 3 feet tall.