This miniseries marks the year in which WWII became the most catastrophic conflict in human history. From the 1920s onwards, an aversion to Soviet Subhumans was a central part of Hitler's ideology. A war with Soviet Russia was always a prerequisite for the success of his racial vision; for the flourishing of Aryan man. When Hitler finally invaded Russia in 1941, he took the Soviets completely by surprise – up to that point the two nations had cooperated freely. What followed was a campaign of unparalleled barbarism, on a scale of destruction unparalleled in history.