These are the periods the NDSM is bestowed June 27, 1950 to July 27, 1954 for service during the Korean War January 1, 1961 to August 14, 1974 for service during the Vietnam War August 2, 1990 to November 30, 1995 for service during the Gulf War September 11, 2001 to a date to be announced for service during the War on Terrorism The Army Servoce Ribbon was insttuted in 1981. This ribbon is bestowed on completion of Initial Entry Training (BCT, OCS . . etc) .