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The German invasion of the Soviet Union in 1941 succeeded in part because they attacked with no warning. The Soviet Union didn't have time to react to the German army's invasion.
The German invasion of the Soviet Union during WW2 was called Operation Barbarossa.
Stalin was surprised by the German invasion of the Soviet Union because he had signed a non-aggression pact with Germany, known as the Molotov-Ribbentrop Pact, and believed that Hitler would not attack.
Germany : Operation Barbarossa was the German invasion of Russia .
no, a German minister did it for him.