I'm not clear on how siege units work in regards to retreating and sword icons on House Cards. For example, in this combat scenario:
House A loses the battle, in which they have a Knight, a footman, and a siege weapon.
House B's Hous card has a single sword icon. House B wins the combat and House A must retreat. Can House A choose to destroy his siege weapon? I understand that he's having to retreat and his siege unit will be destroyed regardless, but I was not sure.
To simplify my question, are sword icons ever applied to siege units? Or is it never?