Air chief marshal
Air chief marshal The ACM insignia from the Royal Air Force. An RAF air chief marshal's star plate. Service branch Air forces Abbreviation Air Chf Mshl / ACM Rank Four-star NATO rank OF-9 Non-NATO rank O-10 Formation 1 August 1919 ( 1919-08-01 ) (RAF) Next higher rank Marshal of the Royal Air Force Next lower rank Air marshal Equivalent ranks General (Army and Royal Marines) Admiral (Navy) General (Canadian Armed Forces) General (US Armed Forces) Common military ranks in English Navies Armies Air forces Commissioned officers Admiral of the fleet Field marshal or General of the army Marshal of the air force Admiral General Air chief marshal Vice admiral Lieutenant general Air marshal Rear admiral Major general Air vice-marshal Commodore Brigadier or brigadier general Air commodore Captain Colonel Group captain Commander Lieutenant colonel Wing commander Lieutenant commander Major or Commandant Squadron leader Lieutenant Captain Flight lieutenant Lieutenant junior grade or sub-lieu...