The European Theater of Operations, United States Army (ETOUSA) was a

Theater Theatre or theater is a collaborative form of performing art that uses live performers, usually actors or actresses, to present the experience of a real or imagined event before a live audience in a specific place, often a stage. The perfor ...

of Operations responsible for directing

United States Army The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, ...

operations throughout the

European theatre of World War II The European theatre of World War II was one of the two main theatres of combat during World War II. It saw heavy fighting across Europe for almost six years, starting with Germany's invasion of Poland on 1 September 1939 and ending with the ...

, from 1942 to 1945. It commanded

Army Ground Forces The Army Ground Forces were one of the three autonomous components of the Army of the United States during World War II, the others being the Army Air Forces and Army Service Forces. Throughout their existence, Army Ground Forces were the large ...

(AGF),

United States Army Air Forces The United States Army Air Forces (USAAF or AAF) was the major land-based aerial warfare service component of the United States Army and ''de facto'' aerial warfare service branch of the United States during and immediately after World War II ...

(USAAF), and

Army Service Forces The Army Service Forces was one of the three autonomous components of the United States Army during World War II, the others being the Army Air Forces and Army Ground Forces, created on 9 March 1942. By dividing the Army into three large comman ...

(ASF) operations north of Italy and the

Mediterranean The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on ...

coast. It was bordered to the south by the North African Theater of Operations, United States Army (NATOUSA), which later became the

Mediterranean Theater of Operations The Mediterranean Theater of Operations, United States Army (MTOUSA), originally called the North African Theater of Operations, United States Army (NATOUSA), was a military formation of the United States Army that supervised all U.S. Army for ...

, United States Army (MTOUSA). The term ''theater of operations'' was defined in the US Army field manuals as ''the land and sea areas to be invaded or defended, including areas necessary for administrative activities incident to the military operations''. In accordance with the experience of

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...

, it was usually conceived of as a large land mass over which continuous operations would take place and was divided into two chief areas-the

combat Combat (French for ''fight'') is a purposeful violent conflict meant to physically harm or kill the opposition. Combat may be armed (using weapons) or unarmed ( not using weapons). Combat is sometimes resorted to as a method of self-defense, or ...

zone, or the area of active fighting, and the Communications Zone, or area required for administration of the theater. As the armies advanced, both these zones and the areas into which they were divided would shift forward to new geographic areas of control.

History

British–American military staffs agreed during their meetings in Washington in January–March 1941 (the ABC-1 Conversations) to exchange military missions to facilitate planning for the eventuality of American entry in the war.Ray S. Cline, ''Washington Command Post: The Operations Division''
Appendix B: U.S. Army Commanders in Major Theater Commands, December 1941 – September 1945
via HyperWar, accessed March 2012 Major General James E. Chaney, an Army Air Corps officer, arrived in the United Kingdom on 18 May 1941, and on the following day, Headquarters, Special Observer Group (SPOBS), was established in London. SPOBS also had the role of studying British use of

Lend Lease Lend-Lease, formally the Lend-Lease Act and introduced as An Act to Promote the Defense of the United States (), was a policy under which the United States supplied the United Kingdom, the Soviet Union and other Allied nations with food, oil, ...

supplies. His formal title was the Special Army Observer in the United Kingdom and head of SPOBS. After the United States entered the war, SPOBS was succeeded by United States Army Forces in the British Isles (USAFBI), actually SPOBS under a new name. At the time of the ARCADIA Conference, December 1941 – January 1942, the decision was made to place the MAGNET forces (U.S. Forces for Northern Ireland) under the command of Maj. Gen. E.L. Daley, and make him in turn responsible to General Chaney, designated as CG, USAFBI. On 5 May 1942, Maj. Gen.

John C. H. Lee John Clifford Hodges Lee (1 August 1887 – 30 August 1958) was a career US Army engineer, who rose to the rank of lieutenant general and commanded the Communications Zone (ComZ) in the European Theater of Operations during World War II. A gra ...

became Commanding General, Services of Supply, U.S. Army Forces British Isles, and later deputy theater commander, ETOUSA. On 8 June 1942, the

United States Department of War The United States Department of War, also called the War Department (and occasionally War Office in the early years), was the United States Cabinet department originally responsible for the operation and maintenance of the United States Army, ...

officially established ETOUSA in its place. Its mission was to conduct planning for the eventual retaking of Europe and to exercise administrative and operational control over U.S. forces. The 133rd Infantry Regiment of the 34th Infantry Division was the first

unit sent to Europe in World War II. The first battalion arrived in

Belfast Belfast ( , ; from ga, Béal Feirste , meaning 'mouth of the sand-bank ford') is the capital and largest city of Northern Ireland, standing on the banks of the River Lagan on the east coast. It is the 12th-largest city in the United Kingdom ...

in late January 1942, followed by the rest of the regiment in February. These units were designated as U.S. Army Northern Ireland Forces, later incorporated within the European Theater of Operations. The 133rd and 168th Infantry Regiments trained in the peat bogs, and performed border guard patrols between British Northern Ireland and neutral Ireland. The remaining unit of the division, the 135th Infantry Regiment, arrived in May 1942.

From February 1944 the operational command was the

Supreme Headquarters Allied Expeditionary Force Supreme Headquarters Allied Expeditionary Force (SHAEF; ) was the headquarters of the Commander of Allied forces in north west Europe, from late 1943 until the end of World War II. U.S. General Dwight D. Eisenhower was the commander in SHAEF ...

(SHAEF) which as an Allied command also had operational control of British and all other allied land forces and tactical airforces in the European

theatre Theatre or theater is a collaborative form of performing art that uses live performers, usually actors or actresses, to present the experience of a real or imagined event before a live audience in a specific place, often a stage. The perfor ...

. Until SHAEF was operational ETOUSA liaised closely with the British in the planning and organising of

Operation Overlord Operation Overlord was the codename for the Battle of Normandy, the Allied operation that launched the successful invasion of German-occupied Western Europe during World War II. The operation was launched on 6 June 1944 (D-Day) with the Norm ...

. U.S. General Dwight D. Eisenhower had multiple command appointments; he replaced Chaney in late June 1942, but in November he also commanded the Allied forces in

Operation Torch Operation Torch (8 November 1942 – 16 November 1942) was an Allied invasion of French North Africa during the Second World War. Torch was a compromise operation that met the British objective of securing victory in North Africa while al ...

through AFHQ. Operation Torch—the invasion of French North Africa—involving the 9th, 3rd Infantry and the 2nd Armored Divisions, initiated on 8 November 1942, was the first ground combat operations for the United States in the European theater of World War II. Eisenhower then relinquished command of ETOUSA to Lt. Gen.

Frank M. Andrews Lieutenant General Frank Maxwell Andrews (February 3, 1884 – May 3, 1943) was a senior officer of the United States Army and one of the founders of the United States Army Air Forces, which was later to become the United States Air Force. ...

in February 1943, who was killed in an air crash in May. He was replaced by Lt. Gen.

Jacob L. Devers Jacob Loucks Devers (; 8 September 1887 – 15 October 1979) was a general in the United States Army who commanded the 6th Army Group in the European Theater during World War II. He was involved in the development and adoption of numerous w ...

, former Chief of the Armored Force. In December 1943 it was announced that Eisenhower would be Supreme Allied Commander in Europe. In January 1944 he resumed command of ETOUSA and the following month was officially designated as the Supreme Commander of the Allied Expeditionary Forces. (Note that Supreme Headquarters of the Allied Expeditionary Forces (SHAEF) was the headquarters of the Commander of the Allied Expeditionary Forces, whereas the AFHQ was the headquarters of only the Allied forces.) He served in a dual role until the end of hostilities in Europe in May 1945. From February 1944, SHAEF was the operational command and ETOUSA administrative command. Some units were transferred between operational commands and administrative commands at different times. For example, the American 6th Army Group, which was set up under the

to oversee Operation Dragoon, the invasion of Southern France between

Toulon Toulon (, , ; oc, label= Provençal, Tolon , , ) is a city on the French Riviera and a large port on the Mediterranean coast, with a major naval base. Located in the Provence-Alpes-Côte d'Azur region, and the Provence province, Toulon is th ...

and

Cannes Cannes ( , , ; oc, Canas) is a city located on the French Riviera. It is a commune located in the Alpes-Maritimes department, and host city of the annual Cannes Film Festival, Midem, and Cannes Lions International Festival of Creativity. T ...

, was passed to SHAEF (and into ETO) a month after the invasion which took place on 15 August 1944. By the end of 1944, Eisenhower, through SHAEF, commanded three powerful Allied army groups. In the north

British 21st Army Group The 21st Army Group was a British headquarters formation formed during the Second World War. It controlled two field armies and other supporting units, consisting primarily of the British Second Army and the First Canadian Army. Established in ...

commanded by Field Marshal Bernard Montgomery (''"Monty"''), in the middle the American 12th Army Group commanded by General Omar N. Bradley, and in the South the American 6th Army Group commanded by Devers. The British 21st Army Group and French elements of the 6th Army Group were not part of ETOUSA, but by that stage of the war most of the operational forces under the command of SHAEF were American. The ETOUSA planning staff in London was usually referred to by its

Army Post Office Military mail, as opposed to civilian mail, refers to the postal services provided by armed forces that allow serving members to send and receive mail. Military mail systems are often subsidized to ensure that military mail does not cost the sende ...

number, "APO 887". After the war in Europe ended on May 8, 1945, ETOUSA became briefly U.S. Armed Forces Europe, then U.S. Forces, European Theater (USFET), and then, eventually,

United States Army Europe United States Army Europe and Africa (USAREUR-AF) is an Army Service Component Command (ASCC) /Theater Army responsible for directing United States Army operations throughout the U.S. European Command (EUCOM) and U.S. Africa Command (AFRICO ...

Albert Coady Wedemeyer General Albert Coady Wedemeyer (July 9, 1896 – December 17, 1989) was a United States Army commander who served in Asia during World War II from October 1943 to the end of the war. Previously, he was an important member of the War Planning Board ...

was chief author of the ''Victory Program'', published three months before the U.S. entered the war in 1941, which advocated the defeat of the German armies on the European continent. When the U.S. entered the war after the Japanese bombed Pearl Harbor on 7 December 1941 and the U.S. was at war with both Japan and Germany, a "

Europe first Europe first, also known as Germany first, was the key element of the grand strategy agreed upon by the United States and the United Kingdom during World War II. According to this policy, the United States and the United Kingdom would use the prepon ...

" a modified version of his plan was adopted by U.S. President

Franklin D. Roosevelt Franklin Delano Roosevelt (; ; January 30, 1882April 12, 1945), often referred to by his initials FDR, was an American politician and attorney who served as the 32nd president of the United States from 1933 until his death in 1945. As the ...

and British Prime Minister

Winston Churchill Sir Winston Leonard Spencer Churchill (30 November 187424 January 1965) was a British statesman, soldier, and writer who served as Prime Minister of the United Kingdom twice, from 1940 to 1945 during the Second World War, and again from ...

. Under the German first policy, the plan was expanded to include the

blueprint A blueprint is a reproduction of a technical drawing or engineering drawing using a contact print process on light-sensitive sheets. Introduced by Sir John Herschel in 1842, the process allowed rapid and accurate production of an unlimited number ...

for the

Normandy Normandy (; french: link=no, Normandie ; nrf, Normaundie, Nouormandie ; from Old French , plural of ''Normant'', originally from the word for "northman" in several Scandinavian languages) is a geographical and cultural region in Northwestern ...

landings.

Successor organizations

ETOUSA became United States Forces European Theater (USFET) from 1 July 1945 to 15 March 1947; and then European Command (EUCOM) 15 March 1947 to 1 August 1952. Official U.S. Army lineage details for the European Theater of Operations are: *Organized 8 January 1942 in England as Headquarters, United States Army Forces in the British Isles *Redesignated 8 June 1942 as Headquarters, European Theater of Operations, United States Army *Redesignated 1 July 1945 as Headquarters, United States Forces, European Theater *Redesignated 15 March 1947 as Headquarters, European Command *Redesignated 1 August 1952 as Headquarters,

Also, on August 1, 1952 the

United States European Command The United States European Command (EUCOM) is one of the eleven unified combatant commands of the United States military, headquartered in Stuttgart, Germany. Its area of focus covers and 51 countries and territories, including Europe, Russi ...

(USEUCOM) was established with General

Matthew Ridgway General Matthew Bunker Ridgway (March 3, 1895 – July 26, 1993) was a senior officer in the United States Army, who served as Supreme Allied Commander Europe (1952–1953) and the 19th Chief of Staff of the United States Army (1953–1955). Altho ...

in command. Ridgway served concurrently as the NATO

Supreme Allied Commander Europe The Supreme Allied Commander Europe (SACEUR) is the commander of the North Atlantic Treaty Organization's (NATO) Allied Command Operations (ACO) and head of ACO's headquarters, Supreme Headquarters Allied Powers Europe (SHAPE). The commander is ...

(SACEUR). USEUCOM absorbed all functions and elements of EUCOM and additionally assumed control of all US Air Force and US Navy forces in Europe.

Campaigns

The 16 officially recognized US military campaigns in the European Theater of Operations are: * North Africa campaigns: **

Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge formed by the Sinai Peninsula. It is bordered by the Medit ...

Libya Libya (; ar, ليبيا, Lībiyā), officially the State of Libya ( ar, دولة ليبيا, Dawlat Lībiyā), is a country in the Maghreb region in North Africa. It is bordered by the Mediterranean Sea to the north, Egypt to the east, Suda ...

: 11 June 1942 – 12 February 1943, American participation in the Western Desert campaign **

Algeria ) , image_map = Algeria (centered orthographic projection).svg , map_caption = , image_map2 = , capital = Algiers , coordinates = , largest_city = capital , relig ...

- French Morocco: 8–11 November 1942, the

allied landings in North Africa Operation Torch (8 November 1942 – 16 November 1942) was an Allied invasion of French North Africa during the Second World War. Torch was a compromise operation that met the British objective of securing victory in North Africa while al ...

Tunisia ) , image_map = Tunisia location (orthographic projection).svg , map_caption = Location of Tunisia in northern Africa , image_map2 = , capital = Tunis , largest_city = capital , ...

: 17 November 1942 – 13 May 1943, the

Tunisian campaign The Tunisian campaign (also known as the Battle of Tunisia) was a series of battles that took place in Tunisia during the North African campaign of the Second World War, between Axis and Allied forces from 17 November 1942 to 13 May 1943. Th ...

* Italy campaigns: **

Sicily (man) it, Siciliana (woman) , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = Ethnicity , demographics1_footnotes = , demographi ...

: 9 July - 17 August 1943, the allied invasion and liberation of Sicily **

Naples Naples (; it, Napoli ; nap, Napule ), from grc, Νεάπολις, Neápolis, lit=new city. is the regional capital of Campania and the third-largest city of Italy, after Rome and Milan, with a population of 909,048 within the city's adminis ...

- Foggia: *** Air: 18 August 1943 – 21 January 1944 *** Ground: 9 September 1943 – 21 January 1944, from the

Allied invasion of Italy The Allied invasion of Italy was the Allied amphibious landing on mainland Italy that took place from 3 September 1943, during the Italian campaign of World War II. The operation was undertaken by General Sir Harold Alexander's 15th Army ...

to the

Winter Line The Winter Line was a series of German and Italian military fortifications in Italy, constructed during World War II by Organisation Todt and commanded by Albert Kesselring. The series of three lines was designed to defend a western section ...

battles **

Anzio Anzio (, also , ) is a town and ''comune'' on the coast of the Lazio region of Italy, about south of Rome. Well known for its seaside harbour setting, it is a fishing port and a departure point for ferries and hydroplanes to the Pontine Islands ...

: 22 January - 24 May 1944, the landing and battle at Anzio **

Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...

Arno The Arno is a river in the Tuscany region of Italy. It is the most important river of central Italy after the Tiber. Source and route The river originates on Monte Falterona in the Casentino area of the Apennines, and initially takes a ...

: 22 January - 9 September 1944, from the landing at Anzio to the arrival at the Gothic Line ** Northern Apennines: 10 September 1944 – 4 April 1945, the Gothic Line battles ** Po Valley: 5 April - 8 May 1945, the allied spring offensive 1945 * Western Europe campaigns: ** Air Offensive Europe: 4 July 1942 – 5 June 1944, from the first American bombing mission over enemy-occupied territory in Europe to the night before D-day **

: 6 June - 24 July 1944, the allied landings in Normandy ** Northern France: 25 July - 14 September 1944, from

Operation Cobra Operation Cobra was the codename for an offensive launched by the United States First Army under Lieutenant General Omar Bradley seven weeks after the D-Day landings, during the Normandy campaign of World War II. The intention was to take adv ...

to the beginning of Operation Market Garden ** Southern France: 15 August - 14 September 1944, the allied landings in Southern France **

Rhineland The Rhineland (german: Rheinland; french: Rhénanie; nl, Rijnland; ksh, Rhingland; Latinised name: ''Rhenania'') is a loosely defined area of Western Germany along the Rhine, chiefly its middle section. Term Historically, the Rhinelands ...

: 15 September 1944 – 21 March 1945, from Operation Market Garden to the start of the allied invasion of Germany ** Ardennes-

Alsace Alsace (, ; ; Low Alemannic German/ gsw-FR, Elsàss ; german: Elsass ; la, Alsatia) is a cultural region and a territorial collectivity in eastern France, on the west bank of the upper Rhine next to Germany and Switzerland. In 2020, it had ...

: 16 December 1944 – 25 January 1945, the

Battle of the Bulge The Battle of the Bulge, also known as the Ardennes Offensive, was the last major German offensive campaign on the Western Front during World War II. The battle lasted from 16 December 1944 to 28 January 1945, towards the end of the war in ...

Central Europe Central Europe is an area of Europe between Western Europe and Eastern Europe, based on a common historical, social and cultural identity. The Thirty Years' War (1618–1648) between Catholicism and Protestantism significantly shaped the a ...

: 22 March - 11 May 1945, the allied invasion of Germany

References

External links

; Government
Lineage and Honors Information
at the U.S. Army Center of Military History
Records of Headquarters, European Theater of Operations, United States Army (World War II)
at the National Archives ; General information * * {{DEFAULTSORT:United States Army Europe 1942 establishments in England 1945 disestablishments in Germany Mediterranean theatre of World War II Military units and formations established in 1942 Military units and formations disestablished in 1945 Military units and formations of the United States Army in World War II Western European theatre of World War II

History

Successor organizations

Campaigns

See also

References

Further reading

External links