 On 14 November , the Germans launched an assault from Podgorica towards Nikšić to clear a corridor through which the German forces in Montenegro could withdraw towards the Reich . This operation was supported by the Italian 86th National Republican Guard ( GNR ) Battalion . Around 1 @,@ 200 of Đurišić 's Chetniks were deployed on the flanks of the attack . Twelve days of fierce fighting resulted in significant casualties , and the Germans made no progress , losing Boka in the meantime . On 25 November , the Germans decided to abandon this line of attack and attack Kolašin . Chetniks under Đurišić 's command continued to fight alongside the Germans . After reaching Kolašin , Đurišić 's force separated from the Germans to relieve pressure on the German route of march and headed towards Bosnia , marching to the west of the Germans and bypassing Pljevlja . During the breakout and subsequent withdrawal , both the Germans and Chetniks were subjected to frequent attacks by the Allies . 
