actualy, acording to google and other sites america had its own raw materials and they were the ones who sent supplies to europe and america literaly was the reason Japanese Empire had oil so uhh mexico didnt help that much doing ww2m
also, the reason usa joined the war was bc japan bombed pearl harbor cus usa stopped giving them oil, which means usa pretty much had everything it needed to win ww2 without brasil or mexico
well ik it joined but still without it we could have won dumba--. ive literaly said that like, 8 times. (also pro tip: remember what the person you are arguing against said, trust me it helps winning arguments.)