For affirmative action purposes, a person who served on active duty for more than one hundred eighty days, any part of which occurred between February 28, 1961, and May 7, 1975, in the Republic of Vietnam, or between August 5, 1964, and May 7, 1975, in all other cases; and was discharged or released from active duty with other than a dishonorable discharge; or who was discharged or released from active duty for a service-connected disability if any part of such active duty was performed between August 5, 1964, and May 7, 1975.