By 1973 , how many women had served in Vietnam ?
The medal was awarded to all members of the New Zealand armed forces who , between 29 May 1964 and 27 January 1973 , either : served for 28 days , continuous or aggregated , in ships or craft employed in operations on inland waters or off the coast of Vietnam ; served for one day or more on the posted strength of a unit or formation on land in Vietnam ; conducted one operational sortie over Vietnam or Vietnamese waters by aircrew on the posted strength of a unit allocated for direct support of operations in Vietnam ; served for 30 days or more , continuous or aggregated , on official visits , inspections or other occurrences of a temporary nature on duty in Vietnam , or in ships or craft engaged in operations off the Vietnamese coast .