The German command adjusted the operational plan of action against Partisans to the characteristics of the terrain. They planned to concentrate main partisan divisions and their Supreme Headquarters on the naturally isolated and almost uninhabited area between the Tara and Piva canyons, and the Durmitor mountain, and to destroy it there with the mass use of aviation, artillery and mountain troops. The 1st Mountain Division with its northern wing, the Italian 19th Infantry (Mountain) Division Venezia, the battle group Ludwiger (724th German, 61st and 63rd Bulgarian Regiments), the 369th Infantry Division, the 118th Jäger Division with the 4th Home Guard Jäger Brigade of the Independent State of Croatia were deployed in a semicircle