which is why you frantically beat the knight with a blunt object in hopes of giving him a concussion
Well no, landing a significantly damaging blow with a warhammer to the head is extremely difficult. The swing of a warhammer is too broad, and another warrior with a shield could easily deflect the blow over his head, and that would leave his attacker open to any kind of close-range weapon. A morning star, however, was much more effective because it could be used with one hand, and could deliver blows with the same inertia with a much shorter swing, much more quickly.
And even then, a blow the limbs was the most effective, because with enough force you could deform their armor and break their bones.
