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 South and additional Order Police battalions. These units perpetrated mass murder during The Holocaust and other crimes against humanity. While under military jurisdiction, the area was the site of the massacres at Babi Yar and Kamianets-Podilskyi.