In 1942, Partisans forces were on the rise, having established large liberated territories within Bosnia and Herzegovina. Chetnik forces, partially because of their collaboration with the Italian occupation, were also gaining in strength, however, but were no match to the Partisans and required Axis logistical support to attack the liberated territories. In light of the changing strategic situation, Hitler and the German high command decided to disarm the Chetniks and destroy the Partisans for good. In spite of Hitler's insistence, Italian forces in the end refused to disarm the Chetniks (thus rendering that course of action impossible), under the justification that the Italian occupation forces could not afford to lose the Chetniks as allies in their maintenance of the occupation. When Germans invaded Yugoslavia they met in the Chetniks an organization trained and adapted for guerilla warfare. Although there were some clashes between the Germans and the Chetniks as early as May 1941, Mihailović thought of resistance in terms of setting up an organisation which, when the time was ripe, would rise against the occupying forces. British policy with regard to European resistance movements was to restrain them from activities which would lead to their premature destruction, and this policy coincided initially with the concepts on the basis of which Mihailović's movement was being operated. In order to dissociate himself from the Chetniks who collaborated with the Germans, Mihailović at first called its movement the "Ravna Gora Movement". As early as spring 1942, the Germans favored the collaboration agreement the Ustaše and the Chetniks had established in a large part of Bosnia and Herzegovina. Since the Ustaše military was supplied by, and immediately subordinate to, the German military occupation, collaboration between the two constituted indirect German-Chetnik collaboration. This was all favorable to the Germans primarily because the agreement was directed against the Partisans, contributed to the pacification of areas significant for German war supplies, and reduced the need for additional German occupation troops (as Chetniks were assisting the occupation). After the Italian capitulation on 8 September 1943, the German 114th Jäger Division even incorporated a Chetnik detachment in its advance to retake the Adriatic coast from the Partisans who had temporarily liberated it. The report on German-Chetnik collaboration of the XV Army Corps on 19 November 1943 to the 2nd Panzer Army states that the Chetniks were "leaning on the German forces" for close to a year.