The National Defense Service Medal was awarded for honorable active service for any period between 27 June 1950 and 27 July 1954;
between 1 January 1961 and 14 August 1974; between 2 August 1990 and 30 November 1995 and between 11 September 2001 and a closing date to be determined. Because I was a cadet at the USCGA 1961-63 and an Army draftee 1968-69, I was awarded it twice (authorized to wear a bronze star device on it).
http://en.wikipedia.org/wiki/National_Defense_Service_MedalAlmost anyone serving in Viet Nam qualified for the Vietnam Service Medal
The Vietnam Service Medal was awarded to all members of the Armed Forces of the United States serving in Vietnam and contiguous waters or airspace thereover, after
3 July 1965 through 28 March 1973. Members of the Armed Forces of the United States in Thailand, Laos, or Cambodia, or the airspace thereover, during the same period and serving in direct support of operations in Vietnam are also eligible for this award. To be eligible for award of the medal, individual must- -
- Be attached to or regularly serve for one or more days with an organization participating in or directly supporting military operations; or
- Be attached to or regularly serve for one or more days aboard a naval vessel directly supporting military operations; or
- Actually participate as a crewmember in one or more aerial flights into airspace above Vietnam and contiguous waters directly supporting military operations; or
- Serve on temporary duty for 30 consecutive days or 60 nonconsecutive days in Vietnam or contiguous areas, except that the time limit may be waived for personnel participating in actual combat operations.
Depending on when we were in-country and our assignments, we're authorized to wear
campaign stars on the VSM.
http://en.wikipedia.org/wiki/Vietnam_Service_MedalThose serving in-country for more than 6 months or move are authorized to wear the Vietnam Campaign Medal
This was a medal awarded by the government of South Vietnam (RVN). The Republic of Vietnam Campaign Medal is awarded to personnel who meet one of the following requirements:
- Served in the Republic of Vietnam for six months during the period of 1 March 1961 and 28 March 1973.
- Served outside the geographical limits of the Republic of Vietnam and contributed direct combat support to the Republic of Vietnam and Armed Forces for six months. Such individuals must meet the criteria established for the Armed Forces Expeditionary Medal (for Vietnam) or the Vietnam Service Medal, to qualify for the Republic of Vietnam Campaign Medal.
- Six months service is not required for individuals who were wounded by hostile forces; killed in action or otherwise in line of duty; or captured by hostile forces.
http://en.wikipedia.org/wiki/Republic_of_Vietnam_Campaign_Medal