The area commanders ' duties included security of communications and supply lines , economic exploitation and combatting guerillas ( partisans ) in Wehrmacht 's rear areas , which were the primary tasks of the security divisions . In addition , security and police formations of the SS and the SD ( SS Security Service ) operated in the areas , being subordinated to the respective Higher SS and Police Leaders . These units included multiple '' Einsatzgruppen '' death squad detachments , Police Regiment Centre and additional Order Police battalions . These units perpetrated mass murder during The Holocaust and other crimes against humanity
The Holocaust
The Holocaust
Army Group Centre Rear Area