The Army Group Hindenburg , an Army Group of the German Army, opersated under command of Ober Ost Paul von Hindenburg, who was in command of what section of the Eastern front?
Ober Ost:  In practice it refers not only to said commander, but also to his governing military staff and the district they controlled: "Ober Ost " was in command of the German section of the Eastern front.
i don't know