Naval General Service Medal ( 1915 NGSM ) 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
General Service Medal
General Service Medal (1962)
Naval General Service Medal (1915)