Military Rank Equivalence

Rank Ladder Highest first

🇺🇸 United States · Marines	NATO equivalent	United Kingdom · Marines 🇬🇧
Officers
No equivalent	OF-10 Marshal / General of the Army	Captain General Royal Marines
General	OF-9 General	General
Lieutenant general	OF-8 Lieutenant General	Lieutenant-general
Major general	OF-7 Major General	Major-general
Brigadier general	OF-6 Brigadier General	Brigadier
Colonel	OF-5 Colonel	Colonel
Lieutenant colonel	OF-4 Lieutenant Colonel	Lieutenant colonel
Major	OF-3 Major / Commandant	Major
Captain	OF-2 Captain / 1st Lieutenant	Captain
First lieutenant Second lieutenant	OF-1 Lieutenant	Lieutenant Second lieutenant
Midshipman / officer candidate	OF-D Student Officer	Officer cadet
Enlisted ranks
Sergeant major Master gunnery sergeant	OR-9 Sergeant Major	Warrant officer class 1
First sergeant Master sergeant	OR-8 1st Sergeant	Warrant officer class 2
Gunnery sergeant	OR-7 Sergeant 1st Class	Colour sergeant
Staff sergeant	OR-6 Staff Sergeant	Sergeant
Sergeant	OR-5 Sergeant	No equivalent
Corporal	OR-4 Corporal	Corporal
Lance corporal	OR-3 Private 1st Class	Lance corporal
Private first class	OR-2 Private	Marine
Private	OR-1 Private	No equivalent

Tiers neither force uses are hidden. An OF/OR code held by only one of the two is kept and marked — a missing tier is itself a difference in how the two hierarchies are built.