And they'd all be wrong. The Allies won the war. None of them did it on their own. Nor could they had they tried. The UK was going to fall. The USSR was going to fall. It took all of us to destroy the Axis.
I think people having pride (or indeed shame) in their own nation — whichever nation that may be — for historic military engagements is misplaced, and is really an example of exceptionalism. It’s not a small thing either; I think this sentiment significantly aided Vote Leave’s Brexit campaign. As another commenter pointed out — British people know that we won “two world wars and one World Cup”.
Both Churchill and Roosevelt had planned to continue supplying Japan so they could destroy China, the supplies were cutoff without their knowledge.
Once promised US oil was cutoff and the secret treaty signed in 1905 by Teddy and Japan was reneged on, the Japanese needed to invade the rest of Asia (starting with Indonesia) to keep their war machine fueled, bombing Pearl Harbor ensured they could do this with less US resistance in the Pacific.