kalabić became an officer of the serbian state guard (sds) following the axis invasion and occupation of the kingdom of yugoslavia. he was also appointed prefect for the county of požarevac and passed on information and military supplies to the chetniks, with whom his son, nikola, fought and served as a commander. after a period of surveillance, kalabić was arrested by the german gestapo on 3 october 1942 and executed alongside other chetnik prisoners.