Ranks and insignia of NATO affiliated nations are combined military ranks and insignia used by the member countries (and other affiliated nations) of the North Atlantic Treaty Organization.
The rank scale is used for specifying posts within NATO.
NATO maintains a "standard rank scale" which is also known as a "standardized reference system" in an attempt to match every member country's military ranks to corresponding ranks used by the other members.[1] The NATO rank reference code categories were established in a 1978 document entitled STANAG 2116 (formally titled NATO Codes for Grades of Military Personnel).
NATO rank codes are not the same as military ranks (US Army examples: Private, Corporal, Warrant Officer 1, Chief Warrant Officer 5, Captain, Major, Colonel, etc.) and military pay grades (US military examples: E-1, W-1, CW-5, O-1, O-1e, O-10, etc.). They are rank codes that allow for interoperability among NATO member nations.
OF-1 – OF-10 (lowest rank code to highest) are used for commissioned officers:[1]
OR1–OR9 (lowest rank code to highest) are used for other ranks:[1]
The numbers in the system broadly correspond to the U.S. uniformed services pay grades, with OR-x replacing E-x. The main difference is in the commissioned officer ranks, where the US system recognises two ranks at OF-1 level (O-1 and O-2), meaning that all O-x numbers after O-1 are one point higher on the US scale than they are on the NATO scale (e.g. a major is OF-3 on the NATO scale and O-4 on the US scale).
| Rank group | General / flag officers | Senior officers | Junior officers | Officer cadet | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NATO code | OF-10 | OF-9 | OF-8 | OF-7 | OF-6 | OF-5 | OF-4 | OF-3 | OF-2 | OF-1 | OF(D) | Student officer | ||||||||||||||||||||||||
| Uniformed services pay grade | Special grade | O-10 | O-9 | O-8 | O-7 | O-6 | O-5 | O-4 | O-3 | O-2 | O-1 | Officer candidate/Cadet | ||||||||||||||||||||||||
| Rank group | Non-commissioned officers | Enlisted | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NATO code | OR-9 | OR-8 | OR-7 | OR-6 | OR-5 | OR-4 | OR-3 | OR-2 | OR-1 | |||||||||||||||||||||||||||
| Uniformed services pay grade | Special | E-9 | E-8 | E-7 | E-6 | E-5 | E-4 | E-3 | E-2 | E-1 | ||||||||||||||||||||||||||
Army
Air Force
Navy