Fleeing after an imprisonment war is called should still be an option

As a landless adventurer being expelled from a realm, moving your camp and army out of said realm should invalidate the war.

Or at the very least don't make the war score tied to random holdings In the realm. I know there's a lot of things you can't do while at war, but I would rather have an ongoing manhunt for my character than he teleported across the planet because a King checked his pantry.