The I Army Corps / I 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

Prussia Prussia (; ; Old Prussian: ''Prūsija'') was a Germans, German state centred on the North European Plain that originated from the 1525 secularization of the Prussia (region), Prussian part of the State of the Teutonic Order. For centuries, ...

n and then the

Imperial German (, literally translated ) is an archaic term for those ethnic Germans who resided within the German state that was founded in 1871. In contemporary usage, it referred to German citizens, the word signifying people from the German ', i.e., Imp ...

Armies 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 ...

from the 19th Century to

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 ...

. It was established with headquarters in

Königsberg Königsberg (; ; ; ; ; ; , ) is the historic Germany, German and Prussian name of the city now called Kaliningrad, Russia. The city was founded in 1255 on the site of the small Old Prussians, Old Prussian settlement ''Twangste'' by the Teuton ...

(now

Kaliningrad Kaliningrad,. known as Königsberg; ; . until 1946, is the largest city and administrative centre of Kaliningrad Oblast, an Enclave and exclave, exclave of Russia between Lithuania and Poland ( west of the bulk of Russia), located on the Prego ...

, Russia). Initially, the Corps catchment area comprised the entire

Province of East Prussia East Prussia was a 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 Free State of Prussia, ...

, but from 1 October 1912 the southern part of the Province was transferred to the newly formed XX Corps District.German Administrative History
Accessed: 5 June 2012 In peacetime, the Corps 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 ...

. The corps was still in existence at the end of the war, and was disbanded with the demobilisation of the German Army after

Austro-Prussian War

The I Corps fought in the

Austro-Prussian War The Austro-Prussian War (German: ''Preußisch-Österreichischer Krieg''), also known by many other names,Seven Weeks' War, German Civil War, Second War of Unification, Brothers War or Fraternal War, known in Germany as ("German War"), ''Deutsc ...

against

Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...

in 1866, including the

Battle of Trautenau The Battle of Trautenau () or Battle of Trutnov was fought on 27 June 1866, during the Austro-Prussian War. It was the only battle of the war that ended in an Austrian victory over the Prussians, but at a large cost. Background The Prussian ...

and the

Battle of Königgrätz The Battle of Königgrätz (or Sadowa) was the decisive battle of the Austro-Prussian War in which the Kingdom of Prussia defeated the Austrian Empire. It took place on 3 July 1866, near the Bohemian city of Hradec Králové (German: Königgrä ...

Franco-Prussian War

The Corps served in the

Franco-Prussian War The Franco-Prussian War or Franco-German War, often referred to in France as the War of 1870, was a conflict between the Second French Empire and the North German Confederation led by the Kingdom of Prussia. Lasting from 19 July 1870 to 28 Janua ...

against France in 1870–1871. It saw action in the

Battle of Noiseville The Battle of Noisseville on 31 August 1870 was fought during the Franco-Prussian War and ended in a Prussian victory. Traveling from Metz, the French forces under Marshal François Achille Bazaine attempted to break through the investing line of ...

, the

Battle of Gravelotte The Battle of Gravelotte (or Battle of Gravelotte–St. Privat) on 18 August 1870 was the largest battle of the Franco-Prussian War. Named after Gravelotte, a village in Lorraine, it was fought about west of Metz, where on the previous day, ha ...

, the Siege of Metz, the Battle of Amiens, the

Battle of Hallue The Battle of Hallue was a battle of the Franco-Prussian War on 23 and 24 December 1870. The battle was fought between 40,000 French under General Louis Faidherbe and 22,500 Prussian troops under Edwin Freiherr von Manteuffel. The French lost ...

, and the Battle of St. Quentin, among other actions.Cron et al., ''Ruhmeshalle''

Peacetime organisation

From formation in 1820, the Corps commanded two divisions: 1st Division and 2nd Division. These were joined by 37th Division when it was formed on 1 April 1899. 37th Division was transferred to XX Corps when it was formed on 1 October 1912. 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 XIII may refer to: * 13 (number) or XIII in Roman numerals * 13th century in Roman numerals * ''XIII'' (comics), a Belgian comic book series by Jean Van Hamme and William Vance ** ''XIII'' (2003 video game), a 2003 video game based on the comic b ...

XVIII 18 (eighteen) is the natural number following 17 (number), 17 and preceding 19 (number), 19. It is an even composite number. Mathematics 18 is a semiperfect number and an abundant number. It is a largely composite number, as it has 6 divisors a ...

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 Pioneer commonly refers to a person who is among the first at something that is new to a community. A pioneer as a settler is among the first settling at a place that is new to the settler community. A historic example are American pioneers, perso ...

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. The 1st and 2nd Cavalry Brigades were withdrawn to form part of the 1st Cavalry Division and the 43rd Cavalry Brigade was broken up and its regiments assigned to the divisions as reconnaissance units. The Divisions received engineer companies and other support units from the Corps headquarters. In summary, I Corps mobilised with 24 infantry battalions, 8 machine gun companies (48 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, I 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 saw action at the battles of

Stallupönen Nesterov (), until 1938 known by its German language, German name (; ) and in 1938-1946 as Ebenrode, is a types of inhabited localities in Russia, town and the administrative center of Nesterovsky District in Kaliningrad Oblast, Russia, locate ...

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 ...

, and Tannenberg, and the

First Battle of the Masurian Lakes The First Battle of the Masurian Lakes was a German offensive in the Eastern Front 2–16 September 1914, during the Russian invasion of East Prussia. It took place only days after the Battle of Tannenberg where the German Eighth Army encir ...

. The Corps was still in existence at the end of the war.

Commanders

The I Corps had the following commanders during its existence:The Prussian Machine
Accessed: 5 June 2012

References

Bibliography

* * * * * * {{DEFAULTSORT:1 Corps (German Empire) Corps of Germany in World War I