PRK3 THE NATIONAL DEFENSE DECORATION
  three classes – established in 1982
  For: services to national defense in the fight for liberty of the country
  Design: gilt breast badge, 45mm across, with device(s) on suspension ribbon
    Obverse: a five pointed gold star with knobbed points, the central red disk being the state arms of the PRK, a gold five towered Angkor Wat, shocks of grain to the side, and a cogwheel below, along with a Khmer inscription around the top of the red rim of the disk "Decoration, National Defense.";
    Reverse: plain
  Ribbon: 27mm; red 9mm, yellow 2mm, red 1 1/2mm, yellow 2mm, red 1 1/2mm yellow 2mm red 9mm; folded pentagonally
  Device: on both the suspension ribbon and the service bar, 1, 2, or 3 gilt Angkor Wat emblems depending on the class

The First Class has three small gilt Angkor Wat devices on the suspension and service ribbons, the Second Class two, and the Third Class one larger device.

There are several die varieties.

The medal is common.

03 The National Defense Decoration Cl1
PRK3 The National Defense Decoration - 1st Class		 03 The National Defense Decoration Cl2
PRK3 The National Defense Decoration - 2nd Class

03 The National Defense Decoration Cl3
PRK3 The National Defense Decoration - 3rd Class

03 The National Defense Decoration version
An example without a device and a slightly different suspension and silk ribbon was
given to visiting General Stechbarth of the East German National People's Army.

Variations:

National Defense Decoration Die 1 National Defense Decoration Die 2 National Defense Decoration Die 3
Die 1 Die 2 Die 3