The I Royal Bavarian Reserve Corps / I Bavarian RK (German: I. Königlich Bayerisches Reserve-Korps) was a corps level command of the Royal Bavarian Army, part of the German Army, in World War I.[a]
I Royal Bavarian Reserve Corps was formed on the outbreak of the war in August 1914 as part of the mobilisation of the Army. It was initially commanded by General der Infanterie Karl von Fasbender, brought out of retirement. It was still in existence at the end of the war in the 17th Army, Heeresgruppe Kronprinz Rupprecht on the Western Front.
Structure on formation
On formation in August 1914, I Royal Bavarian Reserve Corps consisted of two divisions, made up of reserve units. In general, Reserve Corps and Reserve Divisions were weaker than their active counterparts
- Reserve Infantry Regiments did not always have three battalions nor necessarily contain a machine gun company
- Reserve Jäger Battalions did not have a machine gun company on formation
- Reserve Cavalry Regiments consisted of just three squadrons
- Reserve Field Artillery Regiments usually consisted of two abteilungen of three batteries each
- Corps Troops generally consisted of a Telephone Detachment and four sections of munition columns and trains 
In summary, I Royal Bavarian Reserve Corps mobilised with 25 infantry battalions, 5 machine gun companies (30 machine guns), 6 cavalry squadrons, 12 field artillery batteries (72 guns) and 3 pioneer companies. 5th Bavarian Reserve Division was formed mostly by units drawn from the III Bavarian Corps District.
|I Royal Bavarian Reserve Corps
||1st Bavarian Reserve Division
||1st Bavarian Reserve Infantry Brigade
||1st Bavarian Reserve Infantry Regiment
|2nd Bavarian Reserve Infantry Regiment
|2nd Bavarian Reserve Infantry Brigade
||3rd Bavarian Reserve Infantry Regiment
|12th Bavarian Reserve Infantry Regiment
||1st Bavarian Reserve Cavalry Regiment
|1st Bavarian Reserve Field Artillery Regiment
|1st Reserve Company, 1st Bavarian Pioneer Battalion
|1st Bavarian Reserve Divisional Pontoon Train
|1st Bavarian Reserve Medical Company
|5th Bavarian Reserve Division
||9th Bavarian Reserve Infantry Brigade
||6th Bavarian Reserve Infantry Regiment
|7th Bavarian Reserve Infantry Regiment
|11th Bavarian Reserve Infantry Brigade
||10th Bavarian Reserve Infantry Regiment
|13th Bavarian Reserve Infantry Regiment
|1st Bavarian Reserve Jäger Battalion
||5th Bavarian Reserve Cavalry Regiment
|5th Bavarian Reserve Field Artillery Regiment
|4th Company, 2nd Bavarian Pioneer Battalion
|1st Reserve Company, 2nd Bavarian Pioneer Battalion
|5th Bavarian Reserve Divisional Pontoon Train
|5th Bavarian Reserve Medical Company
||1st Bavarian Reserve Telephone Detachment
|Munition Trains and Columns corresponding to the
III Reserve Corps
On mobilisation, I Royal Bavarian Reserve Corps was assigned to the predominantly Bavarian 6th Army forming part of the left wing of the forces for the Schlieffen Plan offensive in August 1914.
I Bavarian Reserve Corps had the following commanders during its existence:
- ^ From the late 1800s, the Prussian Army was effectively the German Army as, during the period of German unification (1866-1871), the states of the German Empire entered into conventions with Prussia regarding their armies. Only the Bavarian Army remained fully autonomous and came under Prussian control only during wartime.
- ^ Cron 2002, p. 86
- ^ The Prussian Machine Archived 29 July 2014 at the Wayback Machine. Accessed: 3 March 2012
- ^ Cron 2002, pp. 88–89
- ^ Ellis & Cox 1993, pp. 186–187
- ^ Cron 2002, p. 111 About a third of Reserve Infantry Regiments formed in August 1914 lacked a machine gun company
- ^ Cron 2002, p. 116 Active Jäger Battalions had a machine gun company with the exceptions of the 1st and 2nd Bavarian Jäger Battalions
- ^ Cron 2002, p. 128 Most active cavalry regiments had four squadrons, some were raised to six squadrons
- ^ Cron 2002, p. 134 Active Divisions had a Field Artillery Brigade of two regiments
- ^ Cron 2002, p. 86 Active Corps Troops included a battalion of heavy howitzers (Foot Artillery), an Aviation Detachment, a Telephone Detachment, a Corps Pontoon Train, a searchlight section, 2 munition column sections, one Foot Artillery munitions column section and two Train sections
- ^ War Office 1918, pp. 100,263
- ^ Cron 2002, pp. 319–320
- ^ a b c Without a machine gun company
- ^ "German War History". Retrieved 23 December 2012.
- ^ "Armee-Reserve-Korps". The Prussian Machine. Archived from the original on 11 April 2012. Retrieved 23 December 2012.
- Cron, Hermann (2002). Imperial German Army 1914-18: Organisation, Structure, Orders-of-Battle [first published: 1937]. Helion & Co. ISBN 1-874622-70-1.
- Ellis, John; Cox, Michael (1993). The World War I Databook. Aurum Press Ltd. ISBN 1-85410-766-6.
- 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 Expionary Forces, at General Headquarters, Chaumont, France 1919. The London Stamp Exchange Ltd (1989). 1920. ISBN 0-948130-87-3.
- 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. ISBN 1-870423-95-X.