Cold War By b.tate33 May 26, 1938 House unAmerican Activities Committee formed Feb 11, 1945 Yalta Conference Jul 17, 1945 Potsdam Conference Jul 28, 1945 United Nations formation Feb 27, 1947 Truman doctrine Jun 5, 1947 Marshall Plan Jun 24, 1948 Berlin Airlift Apr 4, 1949 NATO formation Feb 9, 1950 Era of McCarthyism begins Jun 25, 1950 North Korean Invasion of South Jul 27, 1950 Armistice Signed Ending Korean War May 1, 1955 Warsaw Pact formation Oct 4, 1957 Sputnik 1 Launched Apr 12, 1961 First Man in Space May 5, 1961 First American in Space Aug 13, 1961 Creation of the Berlin Wall Jul 20, 1969 First Man on the Moon