I couldn't figure it out. How do WC1, WC2, WCS, WC3, WC4 and WCP differ regarding the damage model of their capital ships? I know that capital ships in WCP are invincible as long as their subsystems have not been destroyed one by one, which requires torpedoes. But I am not sure about the capital ships of the other games. I guess they simply have a certain amount of structural points. When these are at zero, the ship is destroyed.