This is the big one: when Hitler invaded the Soviet Union! But there was still a war in North Africa against the British. Now you can hit the Soviets or peel off an army or two to go after Turkey or Spain/Gibraltar if you still have a hanking to punish the "nation of shopkeepers." But only two turns later Japan is in the war too, so this is the time for the Axis to make progress in a big way! See the attached PDF for set-up. Good luck!