1940s
1945: February 4-11- Yalta Conference Cold War Begins
August 6 - United States first used atomic bomb in war
August 8 - Russia enters war against Japan
August 14 - Japanese surrender End of World War II
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| 1946: March - Winston Churchill delivers"Iron Curtain" Speech
1947: March - Truman declares active role in Greek Civil War
June - Marshall Plan is announced
1948: February - Communist takeover in Czechoslovakia
June 24 - Berlin Blockade begins
1949: July - NATO ratified
May 12 - Berlin Blockade ends
September - Mao Zedong, a Communist, takes control of China
September - Soviets explode first atomic bomb
1950s
1950: February - Joe McCarthy begins Communist witch hunt
June - Korean War begins
1951: January 12 - Federal Civil Defense Administration established
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1953: June 19 - Rosenberg executions
July - Korean War ends
1954: March - KGB established
CIA helps overthrow unfriendly regimes in Iran and Guatemala
July - Vietnam split at 17th parallel
1955: May-Warsaw Pact formed
1956: October - November - Rebellion put down in Communist Hungary. Egypt took control of Suez Canal; U.S. refused to help take it back
1957: October 4 - Sputnik launched into orbit
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| 1958: November - Khrushchev demands withdrawal of troops from Berlin
1959: January - Cuba taken over by Fidel Castro
1960s
1960: May - Soviet Union reveals that U.S. spy plane was shot down over Soviet territory
November - John F. Kennedy elected President
1961: July - Kennedy requests 25% spending increase for military
August 13 - Berlin border closed
August 17 - Construction of Berlin Wall begins
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1962: - U.S. involvement in Vietnam increased
October - Cuban Missile Crisis
1963: July - Nuclear Test Ban Treaty ratified
November - President Kennedy assassinated in Dallas, Texas
1964: August - Gulf of Tonkin incident
1965: April - U.S. Marines sent to Dominican Republic to fight Communism
July - Announcement ofdispatching of 150,000 U.S. troops to Vietnam
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| 1968: January - North Korea captured U.S.Pueblo
August - Soviet troops crush Czechoslovakian revolt
1969: July 20 - Apollo 11 lands on the moon
1970s
1970: April - President Nixon extends Vietnam War to Cambodia
1972: July - SALT I signed
1973: January - Cease fire in Vietnam between North Vietnam and United States
September - United States helps overthrow Chile government
October - Egypt and Syria attack Israel; Egypt requests Soviet aid
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1974: August - President Nixon resigns
1975: April 17 - North Vietnam defeats South Vietnam
1979: July - SALT II signed
November - Shah of Iran overthrown; Iranian Hostage Crisis
1980s
1983: - President Reagan proposes Strategic Defense Initiative
October - U.S. troops overthrow regime in Grenada
1985: - Iran-Contra Affair (arms sold to Iran, profits used to support contras in Nicaragua)
M. Gorbachev ascends to power in Soviet Union
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| 1986: - Gorbachev ends economic aid to Soviet satellites
October - Reagan and Gorbachev resolve to remove all intermediate nuclear missiles from Europe
November - Iran-Contra Affair revealed to public
1987: October - Reagan and Gorbachev agree to remove all medium and short-range nuclear missiles by signing treaty
1989: January - Soviet troops withdraw from Afghanistan
June - China puts down protests for democracy; Poland becomes independent
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September - Hungary becomes independent
November - Berlin Wall falls
December - Communist governments fall in Czechoslovakia, Bulgaria, and Rumania; Soviet empire ends
1990s
1990: March - Lithuania becomes independent
May 29 - Boris Yeltsin elected to presidency of Russia
October 3 - Germany reunited
1991: April - Warsaw Pact ends
August - End of Soviet Union Cold War
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