The following table shows comparative officer ranks of the principal Allied

Allies

In everyday English usage, allies are people, groups, or nations that have joined together in an association for mutual benefit or to achieve some common purpose, whether or not explicit agreement has been worked out between them...

 and Central

Central Powers

The Central Powers were one of the two warring factions in World War I , composed of the German Empire, the Austro-Hungarian Empire, the Ottoman Empire, and the Kingdom of Bulgaria...

 powers during World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

. For modern ranks refer to Comparative military ranks

Comparative military ranks

This article is a list of various states' armed forces ranking designations. Comparisons are made between the different systems used by nations to categorize the hierarchy of an armed force compared to another. Several of these lists mention NATO reference codes. These are the NATO rank reference...

.
See also: Comparative military ranks of World War II

Comparative military ranks of World War II

The following table shows comparative officer ranks of major Allied and Axis powers during World War II. For modern ranks refer to Comparative military ranks.KEY:*Comparative military ranks of World War I*List of comparative military ranks...

Major participants not shown:

Serbia

Kingdom of Serbia

The Kingdom of Serbia was created when Prince Milan Obrenović, ruler of the Principality of Serbia, was crowned King in 1882. The Principality of Serbia was ruled by the Karađorđevic dynasty from 1817 onwards . The Principality, suzerain to the Porte, had expelled all Ottoman troops by 1867, de...

 (entered war on side of the Allies)
Belgium

Belgium

Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

 (entered war on the side of the Allies after the German invasion in 1914)

Bulgaria

Kingdom of Bulgaria

The Kingdom of Bulgaria was established as an independent state when the Principality of Bulgaria, an Ottoman vassal, officially proclaimed itself independent on October 5, 1908 . This move also formalised the annexation of the Ottoman province of Eastern Rumelia, which had been under the control...

 (entered war on side of the Central Powers 1914)

Portugal

Portugal

Portugal , officially the Portuguese Republic is a country situated in southwestern Europe on the Iberian Peninsula. Portugal is the westernmost country of Europe, and is bordered by the Atlantic Ocean to the West and South and by Spain to the North and East. The Atlantic archipelagos of the...

 (entered war on side of the Allies 1916)

Romania

Kingdom of Romania

The Kingdom of Romania was the Romanian state based on a form of parliamentary monarchy between 13 March 1881 and 30 December 1947, specified by the first three Constitutions of Romania...

 (entered war on side of the Allies 1916)


KEY:

Navy

Army

Air Force

Approximate modern NATO equivalent
	United States	British Empire1	France	Italy	Russian Empire2	German Empire	Austro-Hungarian Empire3	Ottoman Empire4
OF-10	Admiral of the Navy General of the Armies	Admiral of the Fleet Field Marshal	Amiral de France5 Maréchal de France5	Ammiraglio Generale d’Esercito	Генера́л-адмира́л (General Admiral) Генера́л-фельдма́ршал (General Field Marshal)	Großadmiral Generalfeldmarschall	Großadmiral / Vezértengernagy Feldmarschall /Tábornagy	Müşir Amiral Müşir
OF-9	Admiral General	Admiral General	Amiral Général d’Armée	Vice Ammiraglio d’Armata Tenente Generale in Comando di Armata	Адмира́л (Admiral) Генерал от инфанте́рии / кавале́рии / артилле́рии (General of the Infantry / Cavalry / Artillery)	Generaladmiral Generaloberst	Admiral / Tengernagy Generaloberst (since 1915)/ Vezérezredes	Birinci Ferik Amiral Birinci Ferik
OF-8	Vice Admiral Lieutenant General	Vice-Admiral Lieutenant-General Lieutenant-General	Vice-Amiral d’Escadre Général de Corps d’Armée	Vice Ammiraglio di Squadra Tenente Generale in Comando di Corpo d'Armata	Ви́це-адмира́л (Vice Admiral) Генера́л-лейтена́нт (Lieutenant General)	Admiral General der Infanterie, General der Kavallerie, General der Artillerie	Vizeadmiral / Altengernagy General der Infanterie / Gyalogsági tábornok, General der Kavallerie / lovassági tábornok, Feldzeugmeister (artillery) / táborszernagy	Ferik Amiral Ferik
OF-7	Rear Admiral Major General	Rear-Admiral Major-General Major-General	Vice-Amiral Général de Division	Contrammiraglio di Divisione Maggior Generale	Ко́нтр-адмира́л (Counter Admiral) Генера́л-майо́р (Major General)	Vizeadmiral Generalleutnant	Kontreadmiral / Ellentengernagy Feldmarschalleutnant / Altábornagy	Liva Amiral Mirliva
OF-6	Commodore Brigadier General	Commodore 1st Class	Contre-Amiral Général de Brigade	Contrammiraglio Brigadier Generale	-	Konteradmiral Generalmajor>	Generalmajor / Vezérőrnagy
		Commodore 2nd Class Brigadier-General Brigadier-General
OF-5	Captain Colonel	Captain Colonel Colonel	Capitaine de Vaisseau Colonel	Capitano di Vascello Colonello	Капита́н 1-го ра́нга (Captain 1st rank) Полко́вник (Polkovnik)	Kapitän zur See Oberst	Linienschiffskapitän / Sorhajókapitány Oberst / Ezredes	Kalyon Kaptanı Miralay
OF-4	Commander Lieutenant-Colonel	Commander Lieutenant-Colonel Lieutenant-Colonel	Capitaine de Frégate Lieutenant-Colonel	Capitano di Frigata Tenente Colonello	Капита́н 2-го ра́нга (Captain 2nd rank) Подполко́вник (Podpolkovnik)	Fregattenkapitän Oberstleutnant	Fregattenkapitän / Fregattkapitány Oberstleutnant / Alezredes	Fırkateyn Kaptanı Kaymakam
OF-3	Lieutenant-Commander Major	Lieutenant-Commander Major Major	Capitaine de Corvette Commandant	Capitano di Corvetta Maggiore	Ста́рший лейтена́нт (Senior Lieutenant) Капита́н/ро́тмистр (Captain/Rittmeister)6	Korvettenkapitän Major	Korvettenkapitän / Korvettkapitány Major / Őrnagy	Korvet Kaptanı Binbaşı
OF-2	Lieutenant Captain	Lieutenant Captain Captain	Lieutenant de Vaisseau Capitaine	Tenente di Vascello Capitano	Лейтена́нт (Lieutenant) Шта́бс-капита́н/Шта́бс-ро́тмистр (Stabs-Captain/Stabs-Rittmeister)6	Kapitänleutnant Hauptmann / Rittmeister 7	Linienschiffsleutnant / Sorhajóhadnagy Hauptmann / Százados, Rittmeister / Kapitány7	Yüzbaşı Yüzbaşı
OF-1	Lieutenant Junior Grade First Lieutenant	Sub-Lieutenant Lieutenant Lieutenant	Enseigne de Vaisseau de 1re classe Lieutenant	Sottotenente di Vascello Tenente	Ми́чман (Midshipman) Пору́чик/пору́чик (Poruchik/Poruchik) 6	Oberleutnant zur See Oberleutnant	Fregattenleutnant / Fregatthadnagy Oberleutnant / Főhadnagy	Mülazım Mülazım-ı evvel
	Ensign Second Lieutenant	Mate Second Lieutenant Second Lieutenant	Enseigne de Vaisseau de 2e Classe Sous-Lieutenant	Guardiamarina Sottotenente	Подпору́чик/корне́т (Sub-Poruchik/Coronet)6	Leutnant zur See Leutnant	Korvettenleutnant / Korvetthadnagy Leutnant / Hadnagy	Mülazım Mülazım-ı sani
	Midshipman	Commissioned Warrant Officer/ Midshipman/ Boatswain	Aspirant Aspirant	Aspirante Guardiamarina Aspirante	Пра́порщик (Praporshchik) (army reserve)