Origin of Cold War Tensions By AlejoAya12 Aug 1, 1941 The Atlantic Charter Period: 1943 to 1945 Wartime Conferences between the Allies Oct 1, 1944 Percentages Agreement 1945 End of the Great Power status of previously dominant European powers. Period: 1945 to Aug 29, 1949 US monopoly over nuclear weaponery Period: 1945 to 1960 Decolonization period around the world Feb 1, 1945 The Yalta Conference Jul 1, 1945 The First successful explosion of an atomic bomb in the US Aug 1, 1945 Postdam Conference Oct 24, 1945 Stablishment of the UN Mar 5, 1946 The Iron Curtain speech 1947 The Truman Doctrine and the Policy of Containment 1948 USSR removes other political group from power Apr 3, 1948 The Marshal Plan Period: Jun 24, 1948 to May 12, 1949 Berlin Blockade Apr 4, 1949 NATO formation Aug 29, 1949 Detonation of an atomic Bomb by the USSR Sep 1, 1949 Creation of the Federal republic of Germany Oct 1, 1949 Victory of the Chinese Communist Party Oct 7, 1949 Creaton of the German Democratic republic