WWII and the Early Cold War Timeline By Kymora Nolan Dec 7, 1941 Japanese Attack on Pearl Harbor Jul 17, 1945 Potsdam Conference (07/17 -08/2) Apr 4, 1949 NATO Created Aug 29, 1949 Soviet Union Obtains Nuclear Weapons Oct 1, 1949 China Becomes Communist 1950 Korean War (1950-53) May 13, 1955 Warsaw Pact Created Jan 31, 1958 Explorer I Launched Aug 13, 1961 Construction of the Berlin War Begins Oct 16, 1962 Cuban Missile Crisis (16th - 29th)