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In 1945, the US drops the Atomic Bomb on Hiroshima, Japan. http://www.history.com/topics/world-war-ii/bombing-of-hiroshima-and-nagasaki/videos http://www.history.com/topics/world-war-ii/bombing-of-hiroshima-and-nagasaki
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The Russians sieze Poland and forces communists rule. http://www.history.com/this-day-in-history/soviet-union-invades-poland
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The Truman Doctrine, which said that it would stop the spread of communism, was announced. https://history.state.gov/milestones/1945-1952/truman-doctrine
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The Berlin Airlift supplied citizens with food and other things for surviving. http://www.history.com/topics/cold-war/berlin-airlift https://www.youtube.com/watch?v=qJQ3n6-oNvs
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The NATO (North Atlantic Treaty Organization) was made. http://www.nato.int/
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The U.S. and U.N. soldiers fight off North Korea. http://www.history.com/topics/korean-war
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In 1957, the Soviet Union Launches the first Satellite (Sputnik I) into space. http://history.nasa.gov/sputnik/ https://www.youtube.com/watch?v=Xw57VErRjA8
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The U.S. soldiers fight and land on the Bay of Pigs in Cuba. http://www.history.com/topics/cold-war/bay-of-pigs-invasion
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The Cuban MIssile Crisis was when the US and Soviets were fighting and the US had reason to believe Cuba had nukes. http://www.history.com/topics/cold-war/cuban-missile-crisis
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Richard Nixon visits China to try to build back relations with them. http://www.history.com/this-day-in-history/nixon-arrives-in-china-for-talks http://www.history.com/this-day-in-history/nixon-announces-visit-to-communist-china
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Vietnam gets taken over by communism after surrendering. https://www.youtube.com/watch?v=IdR2Iktffaw http://www.history.com/this-day-in-history/south-vietnam-surrenders
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In 1985, the Soviets get a new leader, his name is Mikhail Gorbachev. http://www.biography.com/people/mikhail-sergeyevich-gorbachev-9315721 http://www.britannica.com/biography/Mikhail-Gorbachev
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After struggling years with the Berlin Wall, the East German Communist Party said they could cross the border at any time. After that, they started to tear down the wall. http://www.history.com/topics/cold-war/berlin-wall
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In 1990 George Bush and Mikhail Gorbachev agreed to reunify Germany with itself in 1994. http://www.dw.com/en/2-4-x-a-short-history-of-german-reunification/a-18679325
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In 1991 the Soviet Union ends and all states that were in it were their own state now. http://www.history.com/topics/cold-war/fall-of-soviet-union