Territorial Efficiency Medal

The Territorial Efficiency Medal is a medal of the United Kingdom awarded for long service in the Territorial Army. This award superseded the Territorial Force Efficiency Medal when the Territorial Force became the Territorial Army in 1921.

Criteria
The criteria were for a minimum of 12 years service in the Territorial Army with war service counting double. Bars for further periods of 12 years were not awarded because they were not possible, given that this medal was superseded after 9 years by the Efficiency Medal. The medal is referred to as the TEM.

Honourable Artillery Company
For members of the Honourable Artillery Company the ribbon differed, being a half blue, half scarlet ribbon, with yellow edges. This distinction was bestowed by King Edward VII for the Volunteer Long Service And Good Conduct Medal and the honour extended to the same medals under the Territorial designations. The HAC ribbon colours were the household colours of King Edward VII.

Other details
The equivalent award for commissioned officers was the Territorial Decoration.