Shield destruction
Shield hits can damage or destroy the shield. A shield has a Resistance, which is the same as its shield protection value, +5 if the shield is a magic one. The attack has a Break value, which is equal to the damage of the attack before any Protection.
Rolling for Shield Destruction
Break value: Damage of attack before reduction
x 1.5 if Slashing damage
x 1.25 if Bludgeoning damage
Shield Resistance: Shield Protection value +5
If the Break value is >= 3x the Shield Resistance, the shield is damaged (-20% Prot).
If the Break value is >= 5x the Shield Resistance, the shield is broken (-50% Prot).
An already damaged shield that is damaged again has a 25% chance of being broken.
A magic shield (a real, equipable one) that is damaged will repair itself after the battle. If a magic shield is broken, it will be permanently destroyed and the commander will revert to his or her standard shield if he or she had one. Damaged or broken mundane shields will be repaired when they are in a province with enough spare production resources.