Everything is equal until September 1st, 1939. Hitler doesn't invade Poland and the idiot Mussolini doesn't go at it with Greece. The Tripartite Pact was signed September 27 1940. The lesser known signatories was Hungary, Slovakia, Bulgaria,Yugoslavia, Croatia, and Romania. Hitler has his invasion route, against Russia, through the Slovakian, Hungarian, and Romanian Corridor. Probably, what's more important is that he hadn't set off any trip wire situations with respect to France and Britain. Would France and Britain had gone to war to protect Russia, against Nazi expansion? If France and Britain don't get into war with Hitler, what does FDR do, if Western Europe is not threaten by Nazi Germany? Could Russia have staved off the full attention of the German Wehrmacht and its allies?