Nov 16, 2020 · The earliest reference to the Power Wagon was a wartime ad in Collier's, referring to Dodge's "Battle Wagon;" it looked similar to the Power Wagon, but had some major differences.A much closer relative of the Power Wagon was in a Chrysler factory photo dated July 3, 1945; there were no nameplates on the prototype, so the name may not have been selected yet.