U.S. Alliances and Their Consequences By acgreen32 Apr 6, 1917 United States Enters World War I Dec 8, 1941 U.S. Enters World War II Jan 1, 1947 Cold War Era Begins Jul 1, 1991 Cold War Ends Jan 27, 2013 North Korean Leader Vows ‘High-Profile’ Retaliation Over New U.N. Sanctions Feb 12, 2013 Is Israel the only U.S. ally in the Middle East? An answer in map form Feb 16, 2013 Hassan Shateri Dead: Iran Vows Revenge On Israel For Killing Of Guard Commander In Syria Feb 27, 2013 North Koreans Blame U.S. for Fueling ‘Explosive Situation’ Mar 17, 2013 Why Iran May Be Ready to Deal Apr 1, 2013 U.S. Sees North Korea Blustering, Not Acting