On the case of Eston, if they're still playing as smart as they were, they'd try turn them against Darka. "How about your old Duchy back? And why not wait for Darka to be off fighting Tara before we move in and help you take it, eh?"
And it's not like Kerwin's very first war as a Marshal saw the brutal invasion and takeover of the Massillion Duchy, the deposition of its Duke, whom Kerwin looked up to very much, and the pillage of his home region of Nazamroth, or anything....
