WW2 Allied Officer Rank Insignia

Five Allied armies fought World War II under five different rank systems, and none of them named their grades the same way. This table aligns all five by equivalent grade — OF-1a through OF-10 — rather than by title, so a British Second Lieutenant, a Soviet Mladshiy Leytenant, and a Polish Podporucznik can be read as the same rung on five different ladders.

Army	OF-1a	OF-1b	OF-2	OF-3	OF-4	OF-5	OF-6	OF-7	OF-8	OF-9	OF-10
United StatesUS Army	2nd Lieutenant	1st Lieutenant	Captain	Major	Lt Colonel	Colonel	Brigadier General	Major General	Lieutenant General	General	General of the Army
United KingdomBritish Army	Second Lieutenant	Lieutenant	Captain	Major	Lieutenant-Colonel	Colonel	Brigadier §	Major-General	Lieutenant-General	General	Field Marshal
Soviet UnionRed Army (RKKA)	Mladshiy Leytenant	Leytenant †	Kapitan	Mayor	Podpolkovnik	Polkovnik	General-mayor	General-leytenant	General-polkovnik	General armii	Marshal of the Soviet Union
FranceForces Françaises Libres	Sous-lieutenant	Lieutenant	Capitaine	Chef de bataillon	Lieutenant-colonel	Colonel	Général de brigade	Général de division	Général de corps d’armée	Général d’armée	Maréchal de France
PolandWojsko Polskie	Podporucznik	Porucznik	Kapitan ‡	Major	Podpułkownik	Pułkownik	Generał brygady	Generał dywizji	Generał broni	—	Marszałek Polski

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† The Red Army carried an extra grade, Starshiy Leytenant, between Leytenant and Kapitan — it has no clean Western equivalent. ‡ Rotmistrz was the cavalry’s own form of Kapitan, not a separate rank. § A British Brigadier sits at the OF-6 step but was not formally a general officer.

Why America suddenly needed a fifth star

Britain had held Field Marshal since 1736. The Soviet Union created Marshal of the Soviet Union in 1935. The United States had no five-star grade at all until Congress created General of the Army on 14 December 1944 (Public Law 78-482) — a rank invented specifically so that American theatre commanders would not be outranked inside a combined Allied headquarters. Four officers held it during the war: George Marshall, Douglas MacArthur, Dwight Eisenhower, and Henry “Hap” Arnold.

Reading the ladder

The Red Army carried an extra grade, Starshiy Leytenant, between Leytenant and Kapitan — it has no clean Western equivalent, so the table leaves that step annotated rather than force-matched. In the Polish army, Rotmistrz was simply the cavalry’s own form of Kapitan, not a separate rank in the ladder.

Grade equivalence is not identical authority. A British Brigadier, for instance, sits at the OF-6 step on this chart but was not formally a general officer the way its counterparts at that grade were.

Shoulder loop and cuff lace insignia specimens — Fig. 2 · shoulder loop & cuff lace, illustrated to spec

WW2 allied officer rank insignia, one ladder

That's the whole point of lining up rank insignia this way: a WW2 officer's grade should read the same whether you're looking at an American, British, Soviet, French or Polish shoulder board. Once the rank insignia is aligned to the OF-scale rather than to title, this world war 2 rank insignia comparison stops being five separate vocabularies and becomes one comparable rank — the same world war 2 rank insignia comparison works whether you start from the US Army or the Red Army.

Frequently asked questions

Why did the US create a five-star rank in the middle of World War II?

Congress created General of the Army on 14 December 1944 (Public Law 78-482) specifically so that American theatre commanders would not be outranked inside a combined Allied headquarters. Britain had held Field Marshal since 1736 and the Soviet Union had created Marshal of the Soviet Union in 1935, leaving the US as the only major Allied power without an equivalent five-star grade.

Who actually held the rank of General of the Army during the war?

Four officers: George Marshall, Douglas MacArthur, Dwight Eisenhower, and Henry “Hap” Arnold.

Why does the Red Army's ladder have an extra step that doesn't fit neatly with the other four armies?

The Red Army carried an extra grade, Starshiy Leytenant, between Leytenant and Kapitan, and it has no clean Western equivalent — the table leaves that step annotated rather than force-matching it to a rank it doesn’t really correspond to.

Was a British Brigadier equivalent in authority to a US Brigadier General?

Not formally. A British Brigadier sits at the OF-6 step on this chart, the same grade as a US Brigadier General, but was not formally a general officer the way its counterparts at that grade were in the other four armies.

Was Rotmistrz a separate rank in the Polish army?

No — Rotmistrz was simply the cavalry’s own form of Kapitan (Captain), not a distinct rank in the ladder, which is why it’s flagged rather than listed as its own grade.

Sources

Wikipedia, “Comparative officer ranks of World War II” · Wikipedia, “Military ranks of the Soviet Union (1940–1943)” · US Public Law 78-482, 14 December 1944 · De Gruyter, Officer Ranks of the Polish Armed Forces during WWII.