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In August, 1939, Germany invaded Poland. Germany's current leader, Adolf Hitler, wanted to undo the Treaty of Versailles and restore Germany's position in the world. France and The Great Britain were not okay with this and declared war on Germany. http://www.history.com/this-day-in-history/germany-invades-poland
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In 1940 German troops worked their way in to France to take over the capital city, Paris. It was one of Hitler's goals to take over France. Parisians gave up easily and Paris was now in Germany's hands. http://www.historyinanhour.com/2012/06/22/the-fall-of-france-summary/
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In September, 1940, Hitler decides to bomb London to start fighting for his greatest target, Great Britain. The bombing went on for 76 nights and many cities got damaged. http://www.bbc.co.uk/history/events/germany_bombs_london
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The U.S started to help out foreign countries with lending military aid. Great Britain, The Soviet Union and China are some countries who received help. This brought the U.S closer to entry the war.http://www.history.com/topics/world-war-ii/lend-lease-act
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Operation "Barbarossa" was the codename for the invasion on The Soviet Union made by Nazi Germany. It was the largest military operation for Germany during World War II. After several battles during the summer and fall, The Soviet Union launches a major counterattack on December 6 and drives the Germans to give up. https://www.ushmm.org/wlc/en/article.php?ModuleId=10005164
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On December 7,1941, Japan surprisingly attacks Pearl Harbor in Hawaii. 2,400 Americans died in the attack and now President Roosevelt wanted to declare war on Japan.
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After the Pearl Harbor attack, Hitler now declares war on the U.S and drags America into the European conflict. U.S navy was already attacking German U-boats but it was on the December 11 that the declaration of war was made. http://www.history.com/this-day-in-history/germany-declares-war-on-the-united-states
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Japan and America fought one of the most important naval battles on June 4 to June 7. America came out as winners form the battle and headed over to Tokyo. http://www.history.com/topics/world-war-ii/battle-of-midway
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The U.S and other allied countries planned a battle along French west coast to get the rid of Nazi Germany's control. It's one of the biggest military assaults in the history and it required extreme planning. It was over in August 1944 and the northern France was now liberated. http://www.history.com/topics/world-war-ii/d-day
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America was the first country in history two drop to atomic bombs over two different cities, Hiroshima and Nagasaki, Japan. Over 100,000 people died and this made Japan to surrender. This was the end of World War II. http://www.history.com/topics/world-war-ii/bombing-of-hiroshima-and-nagasaki
