The Military Service Medal () was a military decoration of South Vietnam. Established in 1964, the medal recognised the completion of a prescribed service time, the displayment of good conduct, and the high working spirit in service.
The medal was divided into four classes indicated by a device on the ribbon bar:
The Medal is 37mm wide and is formed of four white Vs in the shape of a cross pattée surrounded by a green wreath. In the centre is a cross pattée with crossed swords between the arms.
The reverse has the words "VIá»ÂT-NAM" along with the words "QUÃÂN-VỤ Bá»ÂI-TINH" in a diamond-shaped section. The ribbon is green with four yellow stripes; the two closer to the centre are 1mm, and the two edge stripes are 3.5mm. The suspension device was a standard trapezoid device.