The 12th Army (German: 12. Armee / Armeeoberkommando 12 / A.O.K. 12) was an army level command of the German Army in World War I formed in August 1915 by the redesignation of Armee-Gruppe Gallwitz. It served exclusively on the Eastern Front and was dissolved on 9 October 1916 when its commander, General der Infanterie Max von Fabeck, was transferred to 8th Army.