I'm not saying you're wrong, I'm just saying that an intact, Allied Britain was an integral part of our effective prosecution of the war in the history that stands. I'm confident that the Russians would have continued to beat the Germans in the East. But I'm not convinced that we would have knocked out Hitler's atomic bomb effort effectively.
Britain was an important staging area for attacks on Germany itself, and yes they were an integral part of the allied force. That's why we wouldn't have let Hitler conquer Britain, before he established roots there like he did in Europe we would have brought the calvary in, from Iceland and Ireland, even if Roosevelt had to lie us into it. It's all hypothetical, but I think contingency plans had been made for such a possibility.
Btw, great screen name, that's a game I can play forever.
Continued to? Hitler attacked Russia June 22, 1941. If he was going to beat Britain, he would have done it before that. And without Britain to supply her (and provide her with intelligence,) Russia would have had a much harder job surviving a German invasion.