Bunić served as pukovnik konjanički (colonel of cavalry) in the Croatian Home Guard.[1] From September 1943 he was in command of the II. konjanički sklop (II. Cavalry Group). He later joined the Brzi zdrug (Mobile Brigade), and commanded the unit at the defense of Travnik. Yugoslav Partisans took the town, resulting in Bunić leading one last defense which resulted in his death on 2 October 1944.[2]