sentences:  Mihailović apparently felt that Jevđević had exceeded his authority by attending the Case White planning conference in Rome, and indeed, when the Yugoslav government-in-exile awarded Jevđević the Order of Karađorđe's Star in early 1943 for his services to the Serb population during the Ustaše massacres of 1941, Mihailović suppressed the announcement of the award because of the nature of Jevđević's agreement with the Italians, although the reason may also have been because he was aware of Chetnik revenge killings of Herzegovinian Catholics and Muslims in response to atrocities committed by the Ustaše in Croatia.Tensions between Mihailović and Jevđević became so apparent that Mihailović reportedly threatened to "string [him] up from the nearest tree".In March, Jevđević publicly demanded an end to the Chetnik killing of Croats in Herzegovina.