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National Defense Medal Hat Pin

The National Defense Medal (NDSM) is awarded to members of the United States Armed Forces who serve honorably during a period of national emergency. The medal has been awarded for four specific times periods: 

Korean War: June 27, 1950 to July 27, 1954

Vietnam War: January 1, 1961 to August 14, 1974

Gulf War: August 2, 1990 to November 30, 1995

Global War on Terrorism: September 11, 2001 to December 31, 2022

 

Hat Pin is 1 1/4".