There was nothing in the US Constitution which precluded a state from leaving the Union. So I'm wondering what right did the North have for attacking the South in order to force it back into the Union? Surely no state would have joined the Union if they thought they could have been invaded and forced into Federal submission! How in the world can the North justify what it did to the South? The North may have wanted to push its values on the South, but what Biblical or legal basis did the North have for the innocent murder of Southern people?