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World War I                                       April 2, 1917

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World War I                                       April 2, 1917

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The U.S. entered World War l because Germany embarked on a deadly gamble. Germany sank many American merchant ships around the British Isles which prompted the American entry into the war.

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World War ll                                     December 7, 1941                                        

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World War ll                                     December 7, 1941                                        

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Following the Japanese bombing of Pearl Harbor, the United States declared war on Japan. Three days later, after Germany and Italy declared war on it, the United States became fully engaged in the Second World War.

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Korean War                                       1950

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Korean War                                       1950

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America wanted not just to contain communism - they also wanted to prevent the domino effect. Truman was worried that if Korea fell, the next country to fall would be Japan, which was very important for American trade.

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Bay of Pigs                                        April 17, 1961

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Bay of Pigs                                        April 17, 1961

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The plan anticipated that the Cuban people and elements of the Cuban military would support the invasion. The ultimate goal was the overthrow of Castro and the establishment of a non-communist government friendly to the United States.

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Cuban Missile Crisis                                   October 1962

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Cuban Missile Crisis                                   October 1962

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The US embargo against Cuba began February 7, 1962. In 1962, the American government was worried that the USSR would attack America from Cuba, because Cuba is near enough that the missiles could reach almost any city in America. Cuba was seen by the US as a communist country, like the Soviet Union.

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This had happened in Eastern Europe after 1945. China had become communist in 1949 and communists were in control of North Vietnam. The USA was afraid that communism would spread to South Vietnam and then the rest of Asia. It decided to send money, supplies and military advisers to help the South Vietnamese Government.

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Iran Hostage Crisis                           1979

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Iran Hostage Crisis                           1979

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The Iran hostage crisis was a diplomatic standoff between the United States and Iran. ... After Shah Pahlavi was overthrown, he was admitted to the U.S. for cancer treatment. Iran demanded his return in order to stand trial for crimes that he was accused of committing during his reign.

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First Gulf War/Persian Gulf War                                                       August 1990

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First Gulf War/Persian Gulf War                                                       August 1990

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Iraqi president Saddam Hussein ordered the invasion and occupation of neighboring Kuwait in early August 1990. Alarmed by these actions, fellow Arab powers such as Saudi Arabia and Egypt called on the United States and other Western nations to intervene.

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Second Gulf War/Iraq War             March 20, 2003          

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Second Gulf War/Iraq War             March 20, 2003          

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The Bush administration based its rationale for the Iraq War on the claim that Iraq had a weapons of mass destruction (WMD) program, and that Iraq posed a threat to the United States and its allies. Some U.S. officials falsely accused Saddam of harboring and supporting al-Qaeda.