The General Service Medal was instituted to recognise service in minor Army and Royal Air Force operations for which no separate medal was intended. Local forces, including police, qualified for many of the clasps, as could units of the Indian Army prior to 1947.

The Naval General Service Medal was instituted in 1915 to recognise service by the Royal Navy and Royal Marines in minor campaigns that would not otherwise earn a specific campaign medal. The Army/Air Force equivalent was the General Service Medal (1918). Both these medals were replaced by the General Service Medal in 1962.