User blog comment:Callumthered/Mexico beats America?/@comment-1777104-20120207025506

Of course, there is a difference between plausibility and ASB. It would only be ASB if the POD involved such things that were not normally available at the time (time travelers, space aliens, that sort of thing). You would have to establish conditions going in to the war that would turn the tide. I'm not sure how far back the POD would have to be, but one or both of the nations would have to have some major interruptions.