12th Reserve Division: (6th Corps District-Silesia).
1914.
The 12th Reserve Division formed, with the 11th Reserve Division, the 6th Reserve Corps, formed in Silesia at the time of mobilization.
Meuse-Argonne.
1. At the outbreak of the war, the division detrained at Sarrebruecken; fought in the neighborhood of Arrancy from the 22d to the 25th of August; remained at Mangiennes from the 27th to the 30th; crossed the Meuse on September 1; was beaten back with heavy losses on September 2 near Cierges; was at Rarécourt on the 7th and near Triaucourt on the 9th; spread out to the east of the Argonne upon Gercourt (11th to the 13th) and Montfaucon (Sept. 17).
2. At the end of September to the end of October took up its position east of Varennes in the district of Malancourt-Chattancourt and toward the end of October took its final position north of Bethencourt (southeast of Cuisy-Bois de Forges).
3. The division occupied this sector until the German offensive upon Verdun (end of February, 1916).
1915.
1. January to December, 1915, sector north of Bethencourt-Bois de Forges.
In April the 27th Infantry Regiment Reserve was transferred to the 117th Division, a new formation.