Had a friend tell me it wouldn’t have mattered. USSR would have defeated Hitler. I pointed out that if England fell the entirety of Nazi power would fall on Russia. No need to maintain any forces. Land or air in the West. No England, no US entry. No 15 000 aircraft. 8,000 tanks,3,500 locomotives, 750 000 transport vehicles, no 100 octane aviation gas. Remarkably he was unimpressed. Said Stalin had it figured out.
Yes but that theory doesn’t take into account Hitler s axis partner, Japan. The Japanese, unbeknownst to Hitler were planning an attack on America which bought us into the war. Hitler, bound to the Axis agreements and his own stupidity declared war on America three days after Pearl Harbor and the rest is history.