 In December 1942 , concerned about the possibility of Allied forces landing in the Balkans , the Germans began planning an anti @-@ Partisan offensive in Bosnia and Herzegovina codenamed " Case White " . The size of the planned offensive required the involvement of both the Croatian Home Guard and the Italians . Late in the planning , the Italians began to prepare and equip Chetnik detachments , including that of Đurišić , for involvement in the operation . In early January 1943 , the Chetnik Supreme Command ordered Montenegrin Chetnik units to carry out " cleansing actions " against Muslims in Bijelo Polje county in north @-@ eastern Montenegro . On 10 January 1943 , Đurišić reported that Chetniks under his command had burned down 33 Muslim villages , killed 400 Muslim fighters — members of the Muslim self @-@ protection militia also supported by the Italians — and had also killed about 1 @,@ 000 Muslim women and children . 
