Imho, the only solution is a blitz decapitation. Allowing the petulant DKRP to steer the course of events by violence whenever they feel like it is insanity. Allowing them to enhance their war making capabilities is also insanity.
It is as if Canada were belligerent towards the US and would sink our ships and lob artillery at Detroit without regard. All the while building a nuclear weapons stockpile. I do not think the American people would let that stand.
On the other hand there has been 60 years or so of cold peace with far less casualties than full blown hostilities would incur. The only problem is that the South has lived under a threat of constant war in that time.