United Kingdom: Efficiency Medal

Ribbon: Dark green with yellow edges.

Instituted: 1930, replacing the Volunteer Long Service Medal, the Colonial Auxilary Forces Long Service Medal, the Militia Long Service Medal, the Special Reserve Long Service Medal and the Territorial Efficiency Medal.
Discontinued: 1 April 1999, being replaced by the Volunteer Reserves Service Medal.

Awarded: For 12 years' service in the ranks of the Territorial and Auxiliary Military Forces throughout the Commonwealth.