From July 1991 to 31 December 1991, Aksentijević was the Assistant Commander of the 5th Military District of the Armed Forces of the SFRY for Moral Education and Legal Affairs. Later he was appointed leader of the Group for Cooperation with the UN Peacekeeping Forces in Sarajevo during the war in Bosnia, where he remained until his forced retirement on 12 May 1992. Whilst in Bosnia Aksentijevic was the chief negotiator with the Vice President of the Presidency of Bosnia and Herzegovina (BiH), Ejup Ganic, on the release of Alija Izetbegovic and the events that surrounding the showdown in Dobrovoljacka Street in Sarajevo on 3 May 1992.