The River Company ("Riječna satnija"), 3rd "A" Brigade Croatian National Guard (ZNG), established on 28 June 1991, the Drava River War Fleet ("Riječne ratne flotile Drava - RRF Drava") established on October 1, 1991, the First River Detachment - River War Fleet (RRF) Sisak "(1. riječni zdrug - Riječna Ratna Flotila (RRF) Sisak)" ZNG and Second River Detachment - River War Fleet (RRF) Osijek ("2. riječni zdrug - Riječna Ratna Flotila (RRF) Osijek").