and then they would move towards Kosovo and southern Serbia. Fierce battles between partisans and Italian-Chetnik forces were fought in the sector Foča-Kalinovik-Gacko-Šavnik. Nevesinje passed from hand to hand as many as eight times. On April 6, Partisan forces forced the Drina, defeated parts of the Taurinense division and the Chetniks near Ifsar, captured Čajniče and besieged Foča, where an Italian battalion and about 1,000 Chetniks were surrounded. Chasing the Chetniks deeper and deeper into Montenegro, the Supreme Headquarters moved to Mount Durmitor. After the heavy defeat inflicted on the Italians in Pivka Javorka, on May 1, the First and Second Proletarian Divisions embarked on a comprehensive offensive to liquidate the Italian-Chetnik garrison in Kolašin, with the intention of continuing the advance towards Berane. As part of the siege of Kolašin, a strike group of battalions (two battalions of the Fourth and one battalion of the Fifth Montenegrin Brigade) defeated the Italian regiment near Bioč on May 15. At the beginning of operation Schwarz, the Yugoslav National Liberation Army had 22,148 soldiers in 16 brigades. There were 8,925 Partisans from Croatia (5,195 of those from Dalmatia), 8,293 from Bosnia and Herzegovina, 1,492 from Serbia (including Vojvodina and Kosovo) and 3,337 from Montenegro. By ethnicity 11,851 were Serbs, 5,220 Croats, 3,295 Montenegrins and 866 Muslims. Partisan units were bringing with them central hospital with about 3,000 wounded. In addition, YNLA troops suffered from severe lack of food and medical supplies, and many were struck down by typhoid. Operation Axis preparations Wehrmacht forces were advancing towards Montenegro from the north and from the east. Partisan forces were keeping parts of the Italian Alpine Division "Taurinense" and about 1,100 Chetniks under blockade in Foča since April 15. In early May, parts of the German 369th Legionary Division penetrated as far as Foča, suppressing the Sixth East Bosnian and Fifteenth Majevica Brigades, liberating the Aosta battalion of the Italian Taurinense division and about 1,000 Chetniks, who had been under siege by Partisan forces for 23 days. The Chetniks were disarmed, and released. The left wing of the 369th Legionary Division advanced from the direction of Priboj towards Pljevlja, and, without encountering any resistance, merged with the main body of the "Taurinense" division. Disarmament of Chetniks During the advance of the 7th SS Mountain Division and the 118th Jäger Division through eastern Herzegovina, German forces encountered a certain degree of Italian obstruction and skirmishes with