As the JNA disengaged from Croatia, its personnel prepared to set up a new Bosnian Serb army; Bosnian Serbs declared the Serbian Republic of Bosnia and Herzegovina on 9 January 1992. Between 29 February and 1 March 1992, a referendum on independence of Bosnia and Herzegovinawhich would later be cited as a pretext for the Bosnian Warwas held. Bosnian Serbs set up barricades in the capital Sarajevo and elsewhere on 1 March, and the next day the first fatalities of the war were recorded in Sarajevo and Doboj. In the final days of March, the Bosnian Serb army started shelling Bosanski Brod, and Sarajevo was attacked on 4 April.