sentences:  Once the Montenegrin nationalists heard about the split between Mihailović's Chetniks and the Partisans, there was an increased impetus for them to collaborate with the Italian occupation forces.On 20 December 1941, Mihailović appointed Đurišić as his commander of all regular and reserve troops in central and eastern Montenegro and parts of the Sandžak.Đurišić's appointment occurred when he travelled to Serbia in late December 1941 and early January 1942 to meet with Mihailović, and returned with detailed instructions which bore Mihailović's signature.