The XX Army Corps / XX AK () was a

corps Corps (; plural ''corps'' ; from French , from the Latin "body") is a term used for several different kinds of organization. A military innovation by Napoleon I, the formation was formally introduced March 1, 1800, when Napoleon ordered Gener ...

level command of the German

Army An army, ground force or land force is an armed force that fights primarily on land. In the broadest sense, it is the land-based military branch, service branch or armed service of a nation or country. It may also include aviation assets by ...

before and during

World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...

. As the German Army expanded in the later part of the 19th century and early part of the 20th century, the XX Army Corps was set up on 1 October 1912 in Allenstein as the ''Generalkommando'' (

headquarters Headquarters (often referred to as HQ) notes the location where most or all of the important functions of an organization are coordinated. The term is used in a wide variety of situations, including private sector corporations, non-profits, mil ...

) for the southern part of

East Prussia East Prussia was a Provinces of Prussia, province of the Kingdom of Prussia from 1772 to 1829 and again from 1878 (with the Kingdom itself being part of the German Empire from 1871); following World War I it formed part of the Weimar Republic's ...

. It took over command of 37th Division from I Corps and the newly formed 41st Division.

General der Artillerie (English language, en: General of the artillery) may mean: A rank of three-star rank, three-star General of the branch, general, comparable to modern armed forces OF-8 grade, in the Imperial German Army and its contingency armies of Prussian A ...

Friedrich von Scholtz, former commander of 21st Division, took command. It was assigned to the I Army Inspectorate. which became the 8th Army at the start of the

First World War World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...

. XX Corps served on the Eastern Front from the start of the war. In September 1915, the corps was upgraded to form ''Armee-Gruppe'' Scholtz, later ''Armee-Abteilung'' Scholtz, as part of the Army of the Niemen. It was reformed from Armee-Abteilung D in September 1918. It was dissolved after the war.

Peacetime organisation

The 25 peacetime

Corps Corps (; plural ''corps'' ; from French , from the Latin "body") is a term used for several different kinds of organization. A military innovation by Napoleon I, the formation was formally introduced March 1, 1800, when Napoleon ordered Gener ...

of the German Army (Guards, I - XXI, I - III Bavarian) had a reasonably standardised organisation. Each consisted of two

divisions Division may refer to: Mathematics *Division (mathematics), the inverse of multiplication * Division algorithm, a method for computing the result of mathematical division Military *Division (military), a formation typically consisting of 10,000 t ...

with usually two infantry brigades, one field artillery brigade and a cavalry brigade each. Each brigade normally consisted of two regiments of the appropriate type, so each Corps normally commanded 8 infantry, 4 field artillery and 4 cavalry regiments. There were exceptions to this rule: : V, VI, VII, IX and XIV Corps each had a 5th infantry brigade (so 10 infantry regiments) : II, XIII, XVIII and XXI Corps had a 9th infantry regiment : I, VI and XVI Corps had a 3rd cavalry brigade (so 6 cavalry regiments) :the Guards Corps had 11 infantry regiments (in 5 brigades) and 8 cavalry regiments (in 4 brigades). Each Corps also directly controlled a number of other units. This could include one or more :Foot Artillery Regiment : Jäger Battalion : Pioneer Battalion :

Train A train (from Old French , from Latin">-4; we might wonder whether there's a point at which it's appropriate to talk of the beginnings of French, that is, when it wa ... , from Latin , "to pull, to draw") is a series of connected vehicles th ...

Battalion

World War I

Organisation on mobilisation

On mobilization on 2 August 1914 the Corps was restructured. 41st Cavalry Brigade was withdrawn to form part of the 1st Cavalry Division and the 37th Cavalry Brigade was broken up and its regiments assigned to the divisions as reconnaissance units. Divisions received engineer companies and other support units from the Corps headquarters. In summary, XX Corps mobilised with 25 infantry battalions, 9 machine gun companies (54 machine guns), 8 cavalry squadrons, 24 field artillery batteries (144 guns), 4 heavy artillery batteries (16 guns), 3 pioneer companies and an aviation detachment.

Combat chronicle

On mobilisation, XX Corps was assigned to the 8th Army to defend East Prussia while the rest of the Army executed the

Schlieffen Plan The Schlieffen Plan (, ) is a name given after the First World War to German war plans, due to the influence of Field Marshal Alfred von Schlieffen and his thinking on an invasion of France and Belgium, which began on 4 August 1914. Schlieffe ...

offensive in August 1914. It took part in the battles of

Gumbinnen Gusev (; ; ; ) is a town and the administrative center of Gusevsky District of Kaliningrad Oblast, Russia, located at the confluence of the Pissa and Krasnaya Rivers, near the border with Poland and Lithuania, east of Chernyakhovsk. It is p ...

, Tannenberg and 1st Masurian Lakes. Immediately after 1st Masurian Lakes it joined 9th Army in Lower Silesia where it fought at the

Battle of the Vistula River The Battle of the Vistula, Vistula River, also known as the Battle of Warsaw and Ivangorod, was a major Russian Empire, Russian victory against German Empire, Germany and Austria-Hungary on the Eastern Front (World War I), Eastern Front during ...

. By May 1915 it was back with 8th Army and on 26 May the commander of XX Corps,

Friedrich von Scholtz, was made commander of the Army, while retaining simultaneous command of his Corps. On 29 September 1915, the headquarters of 8th Army was dissolved. On 18 September 1915, XX Corps was upgraded to form ''Armee-Gruppe'' Scholtz, later ''Armee-Abteilung'' Scholtz, as part of the Army of the Niemen. XX Corps was reformed from Armee-Abteilung D on 21 September 1918.

Commanders

The XX Corps had the following commanders during its existence:

Glossary

*''Armee-Abteilung'' or Army Detachment in the sense of "something detached from an Army". It is not under the command of an Army so is in itself a small Army. *''Armee-Gruppe'' or Army Group in the sense of a group within an Army and under its command, generally formed as a temporary measure for a specific task. *''Heeresgruppe'' or

Army Group An army group is a military organization consisting of several field army, 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 organizatio ...

in the sense of a number of armies under a single commander.

References

Bibliography

* * * * * {{DEFAULTSORT:20th Corps (German Empire) Corps of Germany in World War I Military units and formations established in 1912 Military units and formations disestablished in 1919