- World War II – December 7, 1941 thru December 31, 1946*
- Korean Conflict – June 27, 1950 thru January 31, 1955
- Vietnam Era – August 5, 1964 thru May 7, 1975**
- Persian Gulf War – August 2, 1990 thru a date to be set by law or Presidential Proclamation
**** If the veteran was in service on December 31, 1946, with continuous service before July 26, 1947, this is considered World War II service.
**** Veterans who were “In Country”, (Vietnam), prior to August 5, 1964 would use the following Official Wartime Periods for the Vietnam Era: February 28, 1961 thru May 7, 1975.