Cold War By timmyboger Mar 5, 1946 Iron Curtain Speech 1947 Molotov Plan Proposed Mar 12, 1947 Truman Doctrine Proposed Apr 3, 1948 Marshall Plan Started Jun 24, 1948 Berlin Blockade and Airlift Started Apr 4, 1949 NATO Created May 12, 1949 Berlin Blockade and Airlift Ended Aug 29, 1949 The Soviet Union Tested Its First Atomic Bomb May 14, 1955 Warsaw Pact Started 1956 Invasion of Hungary From 10/23/1956 to 11/10/1956 Aug 13, 1961 Start the Construction of Berlin Wall 1968 Invasion of Czechoslovakia From 08/20/1968 to 09/20/1968 1991 Berlin Wall was destroyed