<p>Actually, Napoleon attacked Russian on June 23 and Hitler attacked the Soviet Union on June 22. Napoleon, who hadn't lost a battle, captured Moscow unopposed in mid-September. However, the evacuating Russians had taken everything edible with them, then proceeded to torch the city. Without supplies, Napoleon had no choice but to retreat. The retreat began in mid-October. </p>
<p>Hitler's army would fight through three Russian winters (and summers) before being driven back.</p>