I think that the USSR would have won the war on their own, and that the only reason the US joined the European theatre was to ensure that the whole of continental Europe did not end up Soviet !!

The landmark battles of Kursk and Stalingrad had already effectivet broken the back of the Wermacht and the Germans had already lost the war (ony nobody realised it) The USSR was throwing 20:1 ratios of men and material onto the eastern Front and they would have bled Germany dry.

Imagine a giant Orc-like army, comprised of millions of Valuevs, lumbering through Europe and bashing up another army of homosexual looking Jurgen Klinsmanns and you may picture what i mean.