In June 1941, Hitler broke the golden rule of warfare never to fight on opposite fronts and marched into the Soviet Union. What would drive him to make the most catastrophic mistake of World War II? This acclaimed four-part series investigates what led to the largest military operation in history - and the bloodiest. Assisted by leading historians and granted unique access to Eastern film archives and to both Soviet and German participants, War of the Century is the definitive series on a war that shaped the borders and attitudes of Europe for the second half of the 20th Century.