Reserve-Korps / XXII RK) was a corps level command of the German Army in World War I. XXII Reserve Corps was formed in October 1914.

[1] 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.

[3] On formation in October 1914, XXII Reserve Corps consisted of two divisions[4] but was weaker than an Active Corps In summary, XXII Reserve Corps mobilised with 26 infantry battalions, 10 machine gun platoons (20 machine guns), 2 cavalry detachments, 18 field artillery batteries (72 guns) and 2 pioneer companies.

XXII Reserve Corps was commanded throughout its existence by General der Kavallerie Eugen von Falkenhayn ,[13][14] Prussian War Minister Erich von Falkenhayn's older brother.