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