Cold War Timeline By kaylatollevsen Period: Jan 1, 1947 to Dec 31, 1961 Cold War A period of tension that occurred between the United States and the Soviet Union after World War II Mar 12, 1947 Truman Doctrine President Truman wrote this doctrine that stated the United States would provide political, military, and economic assistance to any nations under threat of communism or authoritarian forces. Jun 5, 1947 Marshall Plan announced George Marshall planned an American initiative to aid Western European economies after the end of WWII. Sep 2, 1947 Rio Pact An agreement made in Rio that binded the republics of the Western Hemisphere together in a mutual defense system. Jun 24, 1948 Berlin Blockade The Soviet Union blocked the Western Allies' railway, roads, and canal access to the sections of Berlin under western control. Jun 26, 1948 Berlin Airlift Begins In response to the Berlin Blockade, Truman ordered a massive airlift of supplies into West Berlin. Jun 27, 1948 Soviet expels Yugoslavia from Communist Bureau Yugoslavia expelled from the Communist Information Bureau (COMINFORM) which was proof of the permanent split between Russia and Yugoslavia. Apr 4, 1949 NATO formed The North Atlantic Treaty Organization created by many nations to resist Communist expansion. May 11, 1949 Berlin Blockade ends Soviet Union ends the blockade and reopens the access routes to Berlin. Aug 29, 1949 Testing of the Atomic Bomb Soviets test their first atomic bomb in a remote area to see the effects. Feb 12, 1950 Mutual Defense Pact signed The Soviet Union and People's Republic of China sign a pact of mutual defense. Jun 25, 1950 North Korea invades South Korea North Korea invades South Korea which starts the Korean War following a series of clashes along the border. Oct 2, 1950 UN crosses 38th parallel The United Nations crossed the 38th parallel into North Korea during the Korean War to aid the South and occupy North Korea. Apr 11, 1951 Truman fires MacArthur US President Harry Truman fires Douglas MacArthur from command of the US forces in Korea and replaces him with General Matthew Ridgeway. Oct 10, 1951 Truman signs the Mutual Security Act President Truman signs the Mutual Security Act to announce to the world that the US was prepared to provide military aid to free people. Nov 14, 1951 Truman asks Congress to aid Yugoslavia President Truman asks U.S. Congress for military and economic aid for the communist nation Yugoslavia. Jun 14, 1952 USS Nautilus The United States creates the world's first nuclear powered submarine called the USS Nautilus. Oct 2, 1952 UK atomic bomb test The United Kingdom tests their atomic bomb in Operation Hurricane which makes them the third nuclear power in the world. Nov 1, 1952 Ivy Mike The United States tests their first thermonuclear fusion bomb called Ivy Mike. This is a different bomb that uses nuclear fusion. Jan 20, 1953 Eisenhower becomes president Dwight D. Eisenhower becomes president of the United States. He was a five star general during World War II. Mar 5, 1953 Stalin dies Leader of the Soviet Union, Joseph Stalin, dies of a massive heart attack which led to a temporary thaw in Cold War tensions. Jul 27, 1953 Armistice agreement The armistice agreement was signed and formally ended the war between North and South Korea. Feb 8, 1954 Soviet's Prime Minister Replaced Nikolai Bulganin replaces Gregory Malenkov as prime minister of the Soviet Union. Jul 20, 1954 French leave Vietnam The French troops agree to leave from North Vietnam to keep peace. Sep 8, 1954 Defense Treaty signed The South-East Asian defense treaty was signed in Manila for collective defense in Asia and to resist communist expansion. May 9, 1955 West Germany joins NATO West Germany formally joins NATO to help contain Soviet expansion in Europe. This was the final step in integrating that nation into the defense system of Western Europe. May 14, 1955 Warsaw Pact The Warsaw Pact was a collective defense treaty signed in Warsaw, Poland between the Soviet Union and seven European states. Jul 18, 1955 Geneva Summit "The Big Four" met in Switzerland. This included the United States, United Kingdom, Soviet Union, and France. Although they didn't accomplish much, the atmosphere was positive. Apr 17, 1956 Cominform abolished The Soviet Union abolished Cominform and the process of de-Stalinization began. Jun 28, 1956 Political Protests in Poland Massive political protests occur in Poland against the communist government and 74 people die as a result of the protests. Oct 31, 1956 Egypt bombing British and French planes bomb Egyptian airfields during the Suez Canal crisis. Jan 9, 1957 Prime Minister resigns Anthony Eden, the prime minister of Britain, resigns as a result of the Suez Crisis. May 10, 1957 Ending nuclear testing The Soviet Union makes a request that the United States and Britain cease nuclear testing. Nov 15, 1957 Soviets claim they are superior Soviet leader Nikita Khrushchev claims that the Soviet Union has missile superiority over the United States. He challenges the US to a missile shooting match to prove this. Jul 29, 1958 NASA is formed The US creates NASA which shows they are committed to win the space race against the Soviets. Aug 31, 1958 China calls for an end to nuclear testing Nikita Khrushchev meets Mao Zedong in China and calls for an end of all nuclear testing. Nov 27, 1958 Soviets demand troops be removed from Berlin Nikita Khrushchev delivered a speech demanding that the Western Powers remove their troops from Berlin. Jan 8, 1959 Castro enters Havana Castro and his revolutionaries entered into Havana after Batista fled about a week earlier. Feb 16, 1959 Fidel Castro becomes dictator Fidel Castro is sworn in as prime minister of Cuba after leading a guerrilla campaign that forced Batista into exile. Sep 22, 1959 China denied admission to UN The UN members vote against China being admitted into the United Nation. May 1, 1960 Spy planes in the Soviet Union American U-2 spy plane is shot down in the Soviet Union while conducting an espionage. May 27, 1960 No more aid for Cuba United States ends all aid to Cuba because of high taxes on US imports and trade deals with the Soviet Union. Sep 28, 1960 Unified Air Defense Command NATO introduces a unified air defense command. Jan 20, 1961 JFK becomes president John F Kennedy becomes the youngest ever elected president after beating Richard Nixon in the election. Apr 17, 1961 Bay of Pigs Invasion The Bay of Pigs was a failed military invasion of Cuba orchestrated by the CIA. Aug 15, 1961 Berlin Wall East German authorities began building a wall to close off access to the West. This stood as a symbol of the Cold War, representing an iron curtain that divided Europe.