Note that the North had no more rightful claim to federal property than the South did. When you get divorced joint ownership ceases and property is divided. One spouse does not get to claim everything, just because it was once mutually owned.
Also note that the South didn’t attempt to garrison Northern forts or claim areas outside of the Confederacy.
It wasn't the north that ran away.
Also note that the South didnt attempt to garrison Northern forts or claim areas outside of the Confederacy.
Nonsense. The cornfederacy attempted to lay claim to property all across the southwest and up into the northwest territories.