It was formed about the middle of the summer of 1916. It was assembled in July, 1916, at Grafenwoehr Camp (Bavaria), and remained until the end of July in the Valley of the Fecht, and then entrained for the Roumanian front in October.
Roumania.
1. Composed of the 26th, 27th, and 28th Bavarian Regiments, the division took part in the Roumanian campaign and fought in the region of Campolung (October-November, 1916).
2. In December it took part in the operations north of the road Buzeu-Rimnicu-Sarat.
1917.
Focsani.
1. Beginning with January, 1917, the 12th Bavarian Division remained in line north of Focsani.
2. In August it took part in the attacks launched against the Roumanians north of Focsani (from Batinesci to the Sereth) and suffered very heavy losses.
Panciu.
3. Sent to rest after these engagements, it came back into line at the end of September, south of Panciu (Marasesti District).