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First battle in history fought almost exclusively in the air -
Code Name Operation Barbarossa - Broke the nonaggression pact that the two countries had signed two years earlier -
Japanese military launched a surprise attack on the United States Naval Base at Pearl Harbor, Hawaii -
Stopped the German advance into the Soviet Union and marked the turning point in favor of the Allies -
Code Name Operation Overlord - The Allied operation that launched the successful invasion of German-occupied Western Europe -
Ardennes Offensive - Last major German offensive campaign on the Western front