What do OF and OR mean?

OF stands for officer and OR for other ranks (enlisted). NATO codes run OF-1 to OF-10 for commissioned officers and OR-1 to OR-9 for enlisted personnel, giving a single scale to compare ranks across member nations under STANAG 2116.

Why use NATO codes instead of rank names?

Because rank titles differ wildly between nations and services. A NATO code like OF-3 unambiguously identifies the same level — Major in the US and UK armies, Major in the German army — regardless of the local name or insignia.

Do the same codes apply to navy and air force?

Yes, the OF and OR scale is joint, but the titles differ by branch. OF-5 is a Colonel in the army and air force but a Captain in the navy. This table shows army equivalents as the common example.

OF-10 is the highest officer code, equivalent to a five-star General of the Army or a Field Marshal. Many countries no longer use it in peacetime, which is why some columns show it as not used.

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Military Rank Reference

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Comparing military ranks across nations

Every armed force has its own rank titles, insignia, and hierarchical structure, which makes cross-national comparisons confusing. NATO solves this with a standardised code system — OF-1 to OF-10 for commissioned officers and OR-1 to OR-9 for other ranks (enlisted personnel) — defined in STANAG 2116. This reference maps each code to representative US, UK, and German army rank titles so you can translate one nation’s rank into another’s.

The NATO OF and OR scale

Officer (OF) codes run from OF-1 at the junior commissioned officer level to OF-10 at the highest possible general officer rank (five-star equivalents that most nations only use in wartime or leave unfilled in peacetime).

Other Ranks (OR) codes run from OR-1 at the most junior enlisted grade to OR-9 at the highest non-commissioned level (Sergeant Major of the Army equivalents).

The codes are joint — they apply the same way across army, navy, and air force — but the titles differ by both nation and branch. OF-5 is a Colonel in most army and air force contexts, but the same code in a navy context is a Captain (naval). This is a frequent source of confusion in joint or coalition operations.

Army equivalents at a glance

NATO code	US Army	British Army	Bundeswehr (DE)
OF-10	General of the Army*	Field Marshal*	(*not used in peacetime)
OF-9	General	General	General
OF-8	Lieutenant General	Lieutenant General	Generalleutnant
OF-7	Major General	Major General	Generalmajor
OF-6	Brigadier General	Brigadier	Brigadegeneral
OF-5	Colonel	Colonel	Oberst
OF-4	Lieutenant Colonel	Lieutenant Colonel	Oberstleutnant
OF-3	Major	Major	Major
OF-2	Captain	Captain	Hauptmann
OF-1	Lieutenant (1st/2nd)	Lieutenant	Leutnant
OR-9	Sergeant Major of the Army	Warrant Officer 1	Stabsfeldwebel
OR-6	Staff Sergeant	Sergeant	Oberfeldwebel
OR-3	Corporal	Lance Corporal	Gefreiter
OR-1	Private	Private	Schütze

*OF-10 is a five-star wartime rank; most nations have no current OF-10 holders.

Branch differences: why the same code has different titles

The OF/OR scale is joint but rank names are not:

OF-5 in the navy is a Captain (naval) — the same seniority as an army Colonel.
OF-6 in the navy is a Commodore or Rear Admiral (lower half) depending on the nation.
Warrant officers do not map cleanly to the OF/OR scale in all nations. The US Army has a separate WO1–CW5 track; the British Army uses WO1 and WO2 within the OR range.

When working in a joint or coalition context, use the NATO code as the reference — it is unambiguous in a way that rank titles are not.

About STANAG 2116

STANAG 2116 is the NATO Standardisation Agreement that defines the OF and OR equivalency framework. It does not set titles or insignia (those remain national prerogatives); it establishes the common equivalency scale so that allied forces can understand each other’s command hierarchies during combined operations. The reference here uses army examples as the most universally familiar baseline.