In the new simultaneous damage system there is a bug. If a unit attacks an enemy, and kills the enemy, and also suffers damage to itself that puts it at 0 health, the unit will survive with 0 health. It can be healed, or it will die when the fight is over, but it retains the attack strength it had before it suffered the damage. For example, I had a unit with 2/4 men alive walking around with 0 health.