National Defense Service Ribbon NDSM
RIBBON BAR FOR National Defense Service Medal
often abbreviated on DD214 as NDSM
Qualifying Dates: 1950-54 (Korean War period), 1961-74 (Vietnam War Period) , 1990-95 (Persian Gulf War Period), 2001-TBD (War on Terror period)
Criteria: Any honorable active duty service anywhere during any of the above periods.
Until 1987, Army only used a bronze oak leaf cluster to denote an additional award. At this time, it began using bronze stars as the other services did.