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.[5] 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)
On mobilization, on 2 August 1914, the Corps was restructured. The 25th Cavalry Brigade was withdrawn to form part of the 3rd Cavalry Division[8] and the 21st Cavalry Brigade was broken up and its regiments assigned to the divisions as reconnaissance units. The 168th Infantry Regiment was assigned to the 25th Reserve Division in XVIII Reserve Corps. Divisions received engineer companies and other support units from the Corps headquarters. In summary, XVIII 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.
Claus von Bredow, bearb., Historische Rang- und Stammliste des deuschen Heeres (1905)
Günter Wegner, Stellenbesetzung der deutschen Heere 1815–1939. (Biblio Verlag, Osnabrück, 1993), Bd. 1
Bibliography
Cron, Hermann (2002). Imperial German Army 1914–18: Organisation, Structure, Orders-of-Battle [first published: 1937]. Helion & Co. ISBN1-874622-70-1.
Ellis, John; Cox, Michael (1993). The World War I Databook. Aurum Press Ltd. ISBN1-85410-766-6.
Haythornthwaite, Philip J. (1996). The World War One Source Book. Arms and Armour. ISBN1-85409-351-7.
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.