IB History of the Americas- Cold War Timeline By astrogeek20 Apr 3, 1948 Marshall Plan - Truman Oct 1, 1949 Mao Zedong's Takeover of China May 14, 1955 Creation of Warsaw Pact May 1, 1960 U-2 Spy Incident Aug 13, 1961 Construction of the Berlin Wall Aug 10, 1964 Gulf of Tonkin Resolution - LBJ Jan 30, 1968 Tet Offensive