As the USA I have a strategy I call the “Japanese Overload”. As soon as possible the brits build a carrier, the USA supplies the fighters, any pacific fleet swings towards the Atlantic, perhaps delaying as it’s really not needed there. Obvioiusly keep an eye on Japanese, they should concetrate a few rounds on the continent…… You start a long supply line to Canada, the USA transports of England pump from Canada to Karelia. The Brits and USA out-build the Germans leaving the Russians to fight the Japs. Since Russian losses are re-built on the Continent rather than many turns away this works well. Overwhelming allied air-power combined with 1-2 allied infantry/round in moscow helps re-take Russian territory, the rest park on Karelia. The Germans must defend against perhaps 10 British infantry with airpower attacking any coastal territory then having 10 more USA infantry with air before the German next turn. The navy acts as a force multiplier… you must defend against this on Western Europe, Eastern Europe AND Germany. Anyways, at some point the Japs over-commit to the continent, maybe building 2 factories. The remaining Pacific fleet swings back, all US builds goto subs maybe a carrier all on the Pacific side. All air power swings to the pacifc. In the meanwhile your built-up supply line runs for 3 rounds in Europe. If it works, the Jap fleet has not been improved, why should it, they own the Pacific and the USA ran away… But now Japan can’t build navy, if they do those factories on the continent are wasted. You can outbuild the Jap navy, push them off Japan it’s just a matter of time…