# XXIII Reserve Corps (German Empire)

The XXIII Reserve Corps (German: XXIII. Reserve-Korps / XXIII RK) was a corps level command of the German Army in World War I.

## Formation

XXIII Reserve Corps was formed in October 1914. It was part of the first wave of new Corps formed at the outset of World War I consisting of XXII - XXVII Reserve Corps of 43rd - 54th Reserve Divisions (plus 6th Bavarian Reserve Division). The personnel was predominantly made up of kriegsfreiwillige (wartime volunteers) who did not wait to be called up. It was dissolved on 12 August 1918.

### Structure on formation

On formation in October 1914, XXIII Reserve Corps consisted of two divisions. but was weaker than an Active Corps
* Reserve Infantry Regiments consisted of three battalions but only had a machine gun platoon (of 2 machine guns) rather than a machine gun company (of 6 machine guns)
* Reserve Jäger Battalions did not have a machine gun company on formation, though some were provided with a machine gun platoon
* Reserve Cavalry Detachments were much smaller than the Reserve Cavalry Regiments formed on mobilisation
* Reserve Field Artillery Regiments consisted of three abteilungen (2 gun and 1 howitzer) of three batteries each, but each battery had just 4 guns (rather than 6 of the Active and the Reserve Regiments formed on mobilisation)
In summary, XXIII Reserve Corps mobilised with 26 infantry battalions, 8 machine gun platoons (16 machine guns), 2 cavalry detachments, 18 field artillery batteries (72 guns) and 2 pioneer companies.
| Corps | Division | Brigade | Units |
| XXIII Reserve Corps | 45th Reserve Division | 89th Reserve Infantry Brigade | 209th Reserve Infantry Regiment |
| XXIII Reserve Corps | 45th Reserve Division | 89th Reserve Infantry Brigade | 210th Reserve Infantry Regiment |
| XXIII Reserve Corps | 45th Reserve Division | 90th Reserve Infantry Brigade | 211th Reserve Infantry Regiment |
| XXIII Reserve Corps | 45th Reserve Division | 90th Reserve Infantry Brigade | 212th Reserve Infantry Regiment |
| XXIII Reserve Corps | 45th Reserve Division | | 17th Reserve Jäger Battalion |
| XXIII Reserve Corps | 45th Reserve Division | | 45th Reserve Field Artillery Regiment |
| XXIII Reserve Corps | 45th Reserve Division | | 45th Reserve Cavalry Detachment |
| XXIII Reserve Corps | 45th Reserve Division | | 45th Reserve Pioneer Company |
| XXIII Reserve Corps | 46th Reserve Division | 91st Reserve Infantry Brigade | 213th Reserve Infantry Regiment |
| XXIII Reserve Corps | 46th Reserve Division | 91st Reserve Infantry Brigade | 214th Reserve Infantry Regiment |
| XXIII Reserve Corps | 46th Reserve Division | 92nd Reserve Infantry Brigade | 215th Reserve Infantry Regiment |
| XXIII Reserve Corps | 46th Reserve Division | 92nd Reserve Infantry Brigade | 216th Reserve Infantry Regiment |
| XXIII Reserve Corps | 46th Reserve Division | | 18th Reserve Jäger Battalion |
| XXIII Reserve Corps | 46th Reserve Division | | 46th Reserve Field Artillery Regiment |
| XXIII Reserve Corps | 46th Reserve Division | | 46th Reserve Cavalry Detachment |
| XXIII Reserve Corps | 46th Reserve Division | | 46th Reserve Pioneer Company |

## Commanders

XXIII Reserve Corps had the following commanders during its existence:
| From | Rank | Name |
| 25 August 1914 | General der Kavallerie | Georg von Kleist |
| 19 December 1914 | General der Infanterie | Hugo von Kathen |
| 31 July 1918 | Generalleutnant | Arthur von Gabain |