"On December 18, 1940, Hitler signed Directive Number 21, better known as Operation Barbarossa"

Operation Barbarossa was a significant military campaign released by Nazi Germany in 1941 throughout World War II. It was the largest military operation in history and was meant to dominate the Soviet Union. On December 18, 1940, Adolf Hitler signed Directive Number 21, which was the official order to start the invasion of the Soviet Union. This directive was the start of Operation Barbarossa, which was called after the medieval German emperor Frederick Barbarossa. The operation was a significant turning point in the war, as it marked the start of the German-Soviet conflict. The intrusion was a significant failure for the Germans, as they were not able to achieve their goals and were ultimately defeated by the Soviets. The failure of Operation Barbarossa was a major consider the ultimate defeat of Nazi Germany in World War II.