John Gilinsky, on 02 June 2012 - 02:57 AM, said:
Possibly EASTERN FRONT?
Ivan [ aka John ]
the offensive took place on the Eastern Front of the First World War, but the offensive was conducted by the Western Front of the Russian Army. In Russian (and Soviet) armed forces army groups were called "Fronts".
As far as ODBs are concerned, try Reichsarchiv: Der Weltkrieg, I'll try to find which volume is needed.