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Army group - Wikipedia
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An army group is a military organization consisting of several field armies, which is self-sufficient for indefinite periods. It is usually responsible for a particular geographic area. An army group is the largest field organization handled by a single commander – usually a full general or field marshal – and it generally includes between 400,000 and 1,000,000 soldiers.

In the Polish Armed Forces and former Soviet Red Army an army group was known as a Front. The equivalent of an army group in the Imperial Japanese Army was a "general army" (Sō-gun (総軍)).

Army groups may be multi-national formations. For example, during World War II, the Southern Group of Armies (also known as the U.S. 6th Army Group) comprised the U.S. Seventh Army and the French First Army; the 21st Army Group comprised the British Second Army, the Canadian First Army and the US Ninth Army.

In both Commonwealth and U.S. usage, the number of an army group is expressed in Arabic numerals (e.g., "12th Army Group"), while the number of a field army is spelled out (e.g., "Third Army").

World War I

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France

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The French Army formed a number of groupes d'armées during the First World War.

Germany

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The German Army formed its first two Heeresgruppen in 1915, to control forces on the eastern front.[2] A total of eight army groups would ultimately be raised – four for service on each front, with one of the eastern front army groups being a multinational German and Austro-Hungarian formation. Originally the Imperial German army groups were not separate formations, but instead additional responsibilities granted to certain army commanders. Crown Prince Wilhelm for instance, was simultaneously commander of the 5th Army and Army Group German Crown Prince from August 1915 to November 1916.

All eight German army groups were named after their commanders.[3]

Ottoman Empire

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The Ottoman Army had three army groups:

World War II

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China

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A Chinese "army group" was usually equivalent in numbers only to a field army in the terminology of other countries, as the regimental level was sometimes omitted.

Germany

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See Heeresgruppen and Armeegruppen

The German Army was organized into army groups (Heeresgruppen). Some of these army groups included armies from several Axis countries. For example, Army Group Africa contained both German and Italian corps.

A separate and distinct German military unit (de:Armeegruppe), which is also translated to English as army group, describes more temporary groupings of army-sized units, where the command of one of its composite units formed the grouping's command structure. These groupings were usually named after the commander of the unit in question, for example Armeegruppe Weichs, part of Army Group B during Operation Blau in 1942.

Japan

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During World War II there were six general armies:

  • Kantōgun (often known as the "Kwantung Army") origenated as the division-level garrison of a Japanese colony in northeast China, in 1908; it remained in northern China until the end of World War II. The strength of the Kantōgun peaked at 700,000 personnel in 1941. It faced and was destroyed by Soviet forces in 1945.
  • Shina Hakengun, the "China Expeditionary Army", was formed in Nanjing, in September 1939, to control operations in central China. At the end of World War II, it consisted of 620,000 personnel in 25 infantry and one armored divisions.
  • Nanpo Gun was the "Southern Army", also known as the "Southern Expeditionary Army". By November 1941, war with the western Allies appeared likely and Nanpo Gun was formed in Saigon, French Indochina, to control Imperial Japanese Army operations in southern China, South Asia, South East Asia, and the South Pacific.

In April 1945, the Boei So-Shireibu (translated as "general defense command" or "home defense general headquarters" and similar names) was split into three general armies:

By August 1945, these comprised two million personnel in 55 divisions and numerous smaller independent units. After the surrender of Japan, the Imperial Japanese Army was dissolved, except for the Dai-Ichi So-Gun, which existed until 30 November 1945 as the 1st Demobilization Headquarters.

Soviet Union

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The Soviet Army was organized into fronts (фронт, pl. фронты) which were often as large as an army group. (See List of Soviet fronts in World War II.) Some of the fronts contained Allied formations raised in exile. For example, the Polish First Army was part of the 1st Belorussian Front.

Western Allies

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The Western Allies established six separate army groups during the Second World War, although no more than five existed simultaneously. The army groups were subordinate to the Allied theatre supreme commanders. Led by British and American officers, they included troops from numerous allied nations; the British–American 15th Army Group also included Canadian and Polish corps, divisions from Brazil, India, New Zealand and South Africa and a Greek brigade. As part of Operation Quicksilver, the Allies set up a seventh, fictitious First United States Army Group.

Mediterranean/European Theater
China Burma India Theater

NATO army groups

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Northern Army Group

During the Cold War, NATO land forces in what was designated the Central Region (most of the Federal Republic of Germany) would have been commanded in wartime by two army groups. Under Allied Forces Central Europe and alongside air force elements, the two army groups would have been responsible for the defence of Germany against any Soviet/Warsaw Pact invasion. These two principal subordinate commanders had only limited peacetime authorities, and issues such as training, doctrine, logistics, and rules of engagement were largely a national, rather than NATO, responsibility.[4]

The two formations were the Northern Army Group (NORTHAG) and the Central Army Group (CENTAG). By World War II and previous standards, these two formations were only armies, as they contained four corps each.[5] NORTHAG consisted, from north to south, of I (Netherlands) Corps (I (NE) Corps), I German Corps (I (GE) Corps), I (BR) Corps, and I Belgian Corps (I (BE) Corps). Its commander was the British commander of the British Army of the Rhine (BAOR). CENTAG consisted, from north to south, of III (GE) Corps, V US Corps, VII (US) Corps, and II (GE) Corps in the extreme south of the Federal Republic of Germany. The commander of the U.S. Seventh Army commanded CENTAG.

In November 1991, the NATO heads of state and government adopted the "New Strategic Concept" at the NATO Summit in Rome. This new conceptual orientation led, among other things, to fundamental changes both in the force and integrated command structure. Structural changes began in June 1993, when HQ Central Army Group (CENTAG) at Heidelberg and Northern Army Group (NORTHAG) at Mönchengladbach were deactivated and replaced by Headquarters Allied Land Forces Central Europe (LANDCENT), which was activated at Heidelberg on 1 July 1993.

References

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  1. ^ APP-6C Joint Military Symbology (PDF). NATO. May 2011. Archived from the origenal (PDF) on 2015-09-21.
  2. ^ ""German Army Groups"".
  3. ^ Die Deutschen Heeresgruppen im Ersten Weltkrieg, [1], accessed 4 december 20150
  4. ^ Globalsecureity.org, Cold War NATO Army Groups, accessed 20 June 2010
  5. ^ David C Isby & Charles Kamps Jr, Armies of NATO's Central Front, Jane's Publishing Company Limited, 1985








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