I doubt the US would have directly entered the war for a while, and possibly not at all. Without the US's support it's doubtful that Britain and Canada could have single handedly launched an attack on Europe like D-day without getting thrown back to England. An operation similar to Torch would most likely have been possible, considering that Vichy French North Africa didn't exaclty fight to the last man. Rommel certainly would have been given more time. An invasion of Italy and/or the balkans also might have been possible, but Britain would be sapped of most of its strength and the terrain would have made a direct threat to the Reich itself non-existant for a while. Thus Germany would have been able to throw almost all of its manpower at Russia, delaying their advance considerably. Without a quick Russian advance, Germany's allies in Hungary, Bulgaria, Roumania and Finland would have not defected for a long while, thus providing more troops. Japan, however hostile the conditions were, would have provided a distraction for a decent force of Russian troops. End result: Perhaps a stalemate... Anyone have another topic?