@Hetalian_Asian101 hm, I'd say the way that civil wars work are when the country sorta gains a younger sibling, and whoever wins is the sibling that lives, while the other one dies. But, the dead sibling and the living sibling are connected, so it actually hurts the living sibling both emotionally and physically. Emotionally: the living sibling will have depressive episodes, knowing that their sibling, who was part of them, is dead. Physically: since the two are connected, the living one could get physical wounds depending on how the sibling died.
Hope that this helps, and welcome to the fandom!