By the end of 1942, Chetnik–Italian collaboration was routine. Chetnik forces were included in the Italian planning for Case White, a major Axis anti-Partisan offensive which was to be launched on 20 January 1943. On 3 January, Jevđević participated in an Axis planning conference for Case White in Rome, along with senior German, Italian and NDH commanders. The plans included the 12,000 Chetniks under Jevđević's command, and on 23 February 1943 he concluded an agreement with the Germans that they would not cross the Neretva River and that contact between German and Chetnik troops would be avoided. Early in the operation, Jevđević concluded an agreement for cooperation with the commander of NDH troops in Mostar. Later in the operation Jevđević requested, through the Italians, the assistance of the 7th SS Volunteer Mountain Division Prinz Eugen in defending Nevesinje, which faced severe pressure from Partisan forces that had broken through the Chetnik lines at the Battle of the Neretva River. Although the Italians also made this request themselves, the Germans declined, stating that the division was reserved for other tasks.