Once those armies destroying MI leave to refit, they shouldn't return. Unless Coria decides to ignore the treaty they just (sort of) signed anyway, or find a loophole in it. Either of which are plausible possibilities.
If Coria sticks to the treaty and BoM and MI don't blow it up, the war in the east will effectively end. Only the all too aptly named western front will remain. Minas Leon's secession does complicate things however.
