The Efficiency Decoration (ED) is a defunct medal of Britain and the Commonwealth awarded for meritorious and long service in the Territorial Army of the UK, the Indian Volunteer Forces and Colonial Auxiliary Forces. This award superseded the awards to officers throughout the volunteer forces of Britain and the Commonwealth including the Territorial Decoration. The criteria were for a minimum of 12 years service in the Territorial Army, with war service and West African peacetime service counting double. Bars for further periods of six years were also awarded.