XX Corps (German Empire)

The XX Army Corps / XX AK () was a corps level command of the German Army before and during World War I.

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) for the southern part of East Prussia. It took over command of 37th Division from I Corps and the newly formed 41st Division. General der Artillerie Friedrich von Scholtz, former commander of 21st Division, took command.The Prussian Machine Accessed: 7 April 2012 It was assigned to the I Army Inspectorate. which became the 8th Army at the start of the First World War.

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 of the German Army (Guards, I - XXI, I - III Bavarian) had a reasonably standardised organisation. Each consisted of two divisions 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).They formed the Guards Cavalry Division, the only peacetime cavalry division in the German Army. Each Corps also directly controlled a number of other units. This could include one or more Foot Artillery Regiment Jäger Battalion Pioneer Battalion Train Battalion

+Peacetime organization of the Corps Corps Division Brigade Units Garrison XX Corps 37th Division 73rd Infantry Brigade 147th (2nd Masurian) InfantryLyck, III Bn at Lötzen 151st (2nd Ermland) InfantrySensburg, III Bn at Bischofsburg 75th Infantry Brigade 146th (1st Masurian) InfantryAllenstein 150th (1st Ermland) InfantryAllenstein 37th Field Artillery Brigade 73rd (1st Masurian) Field ArtilleryAllenstein 82nd (2nd Masurian) Field ArtilleryRastenburg, Lötzen 37th Cavalry Brigade 10th (East Prussian) Dragoons "King Albert of Saxony"Allenstein 11th (Pomeranian) Dragoons "von Wedel"Lyck 41st Division 72nd Infantry Brigade 18th (1st Posen) Infantry "von Grolman"Osterode 59th (4th Posen) Infantry "Baron Hiller von Gaertringen"Deutsch-Eylau, Soldau 74th Infantry Brigade 148th (5th West Prussian) InfantryElbing, III Bn at Braunsberg 152nd (1st Alsasian) Infantry "Teutonic Order"Marienburg, III Bn at Stuhm 41st Field Artillery Brigade 35th (1st West Prussian) Field ArtilleryHad a third (Horse Artillery) Abteilung of three batteries of 4 guns.Deutsch-Eylau 79th (3rd East Prussian) Field ArtilleryOsterode 41st Cavalry Brigade 5th (West Prussian) Cuirassiers "Duke Frederick Eugene of Württemberg"Riesenburg 4th (1st Pomeranian) Uhlans "von Schmidt"Thorn Corps Troops 1st (East Prussian) Jäger Battalion "Graf Yorck von Wartenberg" Ortelsburg 2nd Fortress Machine Gun Abteilung Lötzen (Fortress Boyen) 23rd (2nd West Prussian) (Fortress-)Pioneer BattalionGraudenz 26th (Masurian) Pioneer BattalionGraudenz 20th (Masurian) Train BattalionMarienburg Allenstein Defence Command(Landwehr-Inspektion)Allenstein

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.

+Initial wartime organization of the Corps Corps Division Brigade Units XX Corps 37th Division 73rd Infantry Brigade 147th Infantry Regiment 151st Infantry Regiment 1st Jäger BattalionWith a machine gun company 75th Infantry Brigade 146th Infantry Regiment 150th Infantry Regiment 37th Field Artillery Brigade 73rd Field Artillery Regiment 82nd Field Artillery Regiment 11th Dragoon Regiment 1st Company, 26th Pioneer Battalion 37th Divisional Pontoon Train 1st Medical Company 41st Division 72nd Infantry Brigade 18th Infantry Regiment 59th Infantry Regiment 74th Infantry Brigade 148th Infantry Regiment 152nd Infantry Regiment 41st Field Artillery Brigade 35th Field Artillery Regiment 79th Field Artillery Regiment 10th Dragoon Regiment 2nd Company, 26th Pioneer Battalion 3rd Company, 26th Pioneer Battalion 41st Divisional Pontoon Train 2nd Medical Company 3rd Medical Company Corps Troops II Battalion, 5th Foot Artillery Regiment4 heavy artillery batteries (16 heavy field howitzers) 15th Aviation Detachment 20th Corps Pontoon Train 20th Telephone Detachment 26th Pioneer Searchlight Section Munition Trains and Columns corresponding to II Corps

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 offensive in August 1914. It took part in the battles of Gumbinnen, 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. By May 1915 it was back with 8th Army and on 26 May the commander of XX Corps, General der Artillerie 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:German Administrative History Accessed: 9 April 2012German War History Accessed: 9 April 2012

Dates Name Notes1 October 1912 to 28 October 1915 General der Artillerie Friedrich von Scholtz Headquarters upgraded to Armee-Abteilung Scholtz21 September 1918 to end of warThe Prussian Machine Accessed: 7 April 2012 Generalleutnant Viktor Albrecht Headquarters reformed from Armee-Abteilung D

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

XX Corps (German Empire)

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