Lets say D-Day fails, or the soviets do better against the nazis on the eastern front, leading to the red army liberating all of europe. As we know from OTL, the soviets were able to greatly boost the popularity of communist parties in the liberated nations, leading to communist takeovers via elections and coups. So would this happen in his TL, aswell (many western countries had a strong communist presence after WW2, even in OTL). How would this affect post war western europe, and what would the effect of an atlantic iron curtain be?
How would the alternate cold war look, with the communist bloc stretching from Pyonjang to Lyon and Naples, while the US only has Britain, the Anglosphere and maybe Japan? Especially with the soviets having more trading partners, therefore deveolping faster and having stronger military and economic power.