Even if by some magic you kept the US out of the European Theatre[1], the Soviets still won't be able to take all of mainland Europe from the Germans. They don't have the capability to do so before the British can force a landing and liberate France.
Once the Red Army is on (or even near) German soil, you can expect the Germans to try and throw all of their available combat formations against them[2], leaving garrison and static forces which the British can almost walk right through. The Soviets will manage to seize everything up to the Rhine though and that still leaves them in a stronger position post-war then OTL even if they suffer similar damage.
Also: Japan taking China is near-impossible and even if they did manage it, it would be a drain rather then a boon with the endless guerrilla warfare operating amongst a population of 600 million that thoroughly hates the Japanese's guts. Japan taking Australia and/or India? Truly impossible. Japan taking all three? Excuse me while I laugh at the prospect.
[1]Which is almost difficult as keeping the US from getting into the Pacific War. By the end of '41, lend-lease was already going to both the Brits and the Russians while US naval forces were actively cooperating in anti-submarine hunts against the Germans.
[2]Which would still wind-up being a case of too late anyways.
Once the Red Army is on (or even near) German soil, you can expect the Germans to try and throw all of their available combat formations against them[2], leaving garrison and static forces which the British can almost walk right through. The Soviets will manage to seize everything up to the Rhine though and that still leaves them in a stronger position post-war then OTL even if they suffer similar damage.
Also: Japan taking China is near-impossible and even if they did manage it, it would be a drain rather then a boon with the endless guerrilla warfare operating amongst a population of 600 million that thoroughly hates the Japanese's guts. Japan taking Australia and/or India? Truly impossible. Japan taking all three? Excuse me while I laugh at the prospect.
[1]Which is almost difficult as keeping the US from getting into the Pacific War. By the end of '41, lend-lease was already going to both the Brits and the Russians while US naval forces were actively cooperating in anti-submarine hunts against the Germans.
[2]Which would still wind-up being a case of too late anyways.