The medal was instituted to obviate the need for an exchange of medals between the allies

High-quality die-struck metal construction for crisp detail and lasting durability

Is the Air Force Cross a gallantry award

GSM 1962 onwards South Vietnam clasp

On 19th October 1919 the King announced the award of a clasp with the dates 5th Aug-22nd Nov 1914 to those that had actually served under fire between those dates

EFFICIENCY DECORATION 1952-69 Category_Full Size Ribbon Bars The medal was instituted toTerritorial Decoration awarded with the green ribbon with central yellow stripe until 1982 when it was combined into a single Decoration emcompassing the AER and T&AVR, the ribbon was then standardised to half blue half green with a central yellow stripe. This can also be awarded with the HAC ribbon to members of the HAC who qualify for the award.