Current uniform period of service dates for periods of armed conflict include:
World War I:
July 28, 1914, through November 11, 1918
World War II:
December 7, 1941, through December 31, 1946
Korean War:
June 27, 1950, through January 31, 1955
Vietnam War:
August 5, 1964, through May 7, 1975
Gulf War:
August 2, 1990, through date to be prescribed by Presidential proclamation or law.
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Operation Desert Shield/Desert Storm:
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August 2, 1990, through April 6, 1991
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Operation Enduring Freedom/Freedom's Sentinel (OEF/OFS) (Afghanistan):
- September 11, 2001, through August 30, 2021
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Operation Iraqi Freedom/New Dawn (OIF/OND) (Iraq):
- September 11, 2001, through December 15, 2011
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Operation Inherent Resolve (OIR) (Islamic State):
- October 15, 2014, through present day
Resource:
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Veterans Preference Laws NDCC37-19.1 and NDCC 37-01-40 (4)
- U.S. Periods of War and Dates of Recent Conflicts (Congressional Research Service)