Soviet Union By embryj Jul 28, 1914 World War I Sep 1, 1939 World War II Mar 5, 1946 Iron Curtain Apr 10, 1947 The Cold War Apr 3, 1948 The Marshall Plan Jun 25, 1950 The korean war Apr 17, 1961 The Bay Pigs Invasion Oct 14, 1962 Cuban Missile Crisis