VaGermany vakatevera Case White nokumwe kurwisa, kwainzi "Case Black"
", vane zvinangwa zvaive "kudzora zvombo zvevaChetnik vese nekuparadza maPartisan ese muMontenegro neSandžak", kuchengetedza mabhauxite akakosha, lead, uye chromium migodhi. Maererano naTomasevich, zvikonzero zvikuru zvekurwisa kwaive kutyisidzira kwekumhara kweAllied muBalkans uye kudiwa kwekubvisa mapoka ekudzivirira aigona kubatsira maAllies. Mukutanga kwaMay 1943, vaGermany vakapinda muSandžak uye kumabvazuva kweMontenegro. Đurišić akadzokera kuKolašin aine varwi vanosvika mazana mashanu uye akabatana nemaSerbian Chetniks aitungamirwa naDragutin Keserović.