 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.