[Tuna-Fish]

Also, the creatures in swarm have only one hit point, and their "weapon" is short. Any unit with very high attack skill and over lenght-0 weapon will annhilate entire armies of them in just one turn as they all attack him, get repelled, take one hit point of damage and die.

I've done it with just a standard ulm commader that carried some good items (burning pearl and some high-att weapon, fire brand perhaps?) and was on hold orders in the front of my army.