Croatian Defence Council
In 1992, when the war escalated in Bosnia and Herzegovina, Prkačin took part as a leader of HSP militia Croatian Defence Forces ("Hrvatske obrambene snage", HOS) with the rank of general, and had close co-operation with government of Alija Izetbegović. In the fall of the same year, he was a member of the joint command of Croatian Defence Council and Army of Bosnia and Herzegovina.