The area commanders' duties included security of communications and supply lines, economic exploitation and combating guerillas (partisans) in Wehrmacht's rear areas.[6] In addition to the Wehrmacht security forces, the SS and the SD formations operated in the same areas, under the command of the respective Higher SS and Police Leaders. These units included Einsatzgruppen detachments, three police regiments (North, Centre and South), the Waffen-SS units of the Kommandostab Reichsführer-SS, and additional Ordnungspolizei (Order Police Battalions), which units perpetrated mass murder during The Holocaust in the areas of military jurisdiction.[7]