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This was the very first concentration camp opened by the Germans. It was originally meant for political prisoners.
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Mussolini sent his army to take Ethiopia, and the army used poison gas and other deadly weapons to do so. This was the first time ever that Ethiopia lost its independence.
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Hitler decided to break the Treaty of Versailles and build up his military strength in the Rhineland.
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Hitler threatened to bomb Prague unless he got free access to the Czech borders, which he was granted, proving that the Munich Pact merely delayed his inevitable attempt to conquer the world.
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This was the catalyst that sparked the beginning of WWII.
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Blitzkrieg was a German term that meant "lightning war". It was a military tactic that used a dense concentration of modern military vehicles and communication technology.
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Operation Barbarossa was Hitler's plan to invade the Soviet Union. It ultimately turned the war to the favor of the Allies due to its failure, making Germany fight the war split to two sides.
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The first, experimental gassing of Jewish people happened this month. After that, it was a daily occurrence until liberation.
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Japan initiated a surprise attack on a US naval base in Hawaii. They destroyed many ships, and caused the US to join WWII.
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This date, Franklin Roosevelt called for a declaration of war against Japan, and the vote was almost unanimous. Germany and Italy had also declared war on the US already.
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The US was able to crack the Japanese codes with some effort, and used them to plan against and intercept Japanese attacks
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Singapore was a strategic military location for Great Britain and a British colony. Japan attacked and battled the British starting in December until the British had to retreat.
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On this day, America defeated the Japanese. This victory was aided by their ability to read Japan's coded messages.
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Although Hitler said surrender was out of the question, the Germans surrendered to the Soviet forces.
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The invasion of Normandy began on this day, also known as D-Day. This battle resulted in the liberation of western Europe.
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On this day, Paris was freed from the grasp of the Germans by US and British troops after over 4 years.
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This was the date that the final conference between the US, UK, and Soviet Union ended. It was at this conference that they demanded surrender from Japan.
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The date that the Americans bombed the city of Hiroshima, Japan. Tens of thousands of people were killed.
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The date that the Americans bombed the city of Nagasaki, Japan. Once again, thousands were killed.