Summary: June 7, 2010 marks the end of 104 months of war in Afghanistan, making it the longest war in American history after the Vietnam War, which continued for 103 months following the Aug. 7, 1964 Tonkin Gulf Resolution. … One-year retrospective: One year ago today, on June 7, 2009 Aubrey Immelman provided his weekly report of U.S. military deaths in Operation Iraqi Freedom and Operation Enduring Freedom (Afghanistan), compiled from U.S. Department of Defense News Releases.