It was established in 1814 as the General Headquarters in Berlin (Generalkommando in Berlin) and became the III Army Corps on 3 April 1820. Its headquarters was in Berlin and its catchment area was the Province of Brandenburg.[1]
In peacetime, the Corps was assigned to the IV Army Inspectorate, joining the 1st Army at the start of the First World War.[2] It was still in existence at the end of the war[3] in the 7th Army, Heeresgruppe Deutscher Kronprinz on the Western Front.[4] The Corps was disbanded with the demobilisation of the German Army after World War I.
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.[10] 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 5 infantry brigades (so 10 infantry regiments)
On mobilization on 2 August 1914 the Corps was restructured. 5th Cavalry Brigade was withdrawn to form part of the 2nd Cavalry Division[14] and the 6th Cavalry Brigade was broken up: the 3rd Hussar Regiment was raised to a strength of 6 squadrons before being split into two half-regiments of 3 squadrons each and the half-regiments were assigned as divisional cavalry to 5th and 6th Divisions; the 6th Cuirassier Regiment was likewise assigned as two half-regiments to 22nd and 38th Divisions of XI Corps. Divisions received engineer companies and other support units from the Corps headquarters. In summary, III Corps mobilised with 25 infantry battalions, 9 machine gun companies (54 machine guns), 6 cavalry squadrons, 24 field artillery batteries (144 guns), 4 heavy artillery batteries (16 guns), 3 pioneer companies and an aviation detachment.
Wegner, Günter (1993). Stellenbesetzung der deutschen Heere 1815-1939, Bd. 1. Biblio Verlag, Osnabrück.
Histories of Two Hundred and Fifty-One Divisions of the German Army which Participated in the War (1914–1918), compiled from records of Intelligence section of the General Staff, American Expeditionary Forces, at General Headquarters, Chaumont, France 1919. The London Stamp Exchange Ltd (1989). 1920. ISBN0-948130-87-3.
The German Forces in the Field; 7th Revision, 11th November 1918; Compiled by the General Staff, War Office. Imperial War Museum, London and The Battery Press, Inc (1995). 1918. ISBN1-870423-95-X.
