I've been thinking about this apparent paradox and I think that I have a solution. In that third-to-last panel, Ansom switches from "our forest units will" to "we'll". Then, Vinny responds with "our move". I think that it's just the forest units that will be stuck and sacrificed. The dwagon wheel is close to the column and Ansom is on a flying carpet; my guess is that he's personally planning to go back and rejoin the column after he wins, safer than ever with Stanley's warlords re-croaked.