To be fair, Coria could also be destroyed, not just Hammarsett. Granted, I doubt either of us could conceivably control all of the others territory with our current lack of nobles but that's just how it is.
The interesting thing is if the estate changes are completed before the war ends, that will open up a lot of new possibilities as you wouldn't need any knights in a realm at all potentially.
You wouldn't have any income either.
