What is the berserk bonus ?
When wounded, some units can go berserk. They gain +X attack, strength and protection, but -X defense (X=unit’s berserk bonus). They cannot rout, but they attack the closest enemy and ignore all orders like cast spell, fire, hold, or attack rear. Some items (like the Berserker Pelt and the Flesh Eater) and spells (like Touch of Madness and Berserkers) make their holder or target automatically berserk even if not wounded.