What if the Anglo-Japanese Alliance was not terminated and would lead to Anglo-Japanese cooperation against a Nazi-Soviet-Italian Axis? The only way to have the Soviets enter the Axis would be to have Hitler assassinated pre-1941 and replace him with a Nazi leader who accepts Stalin's proposal and conditions to enter the Axis. The only way the US could enter the war is if Alaska was suddenly attacked. With the Soviets on the Axis, it's likely Finland and Romania would likely join the Allies. (Romania would also be fighting Bulgaria and Hungary). How would a front in Central Asia between the British and Soviets turn out? Yugoslavia becomes a difficult question.