SAO North-East Bosnia
SAO North-East Bosnia (Serbian: САО Североисточна Босна / SAO Severoistočna Bosna) was a Serb Autonomous Region (Serbian: САО / SAO), a Serb break-away province, in the Yugoslav republic of Bosnia and Herzegovina (SR BiH). It was established in September 1991, proclaimed by the Serb Democratic Party on 19 September 1991, along with other SAOs (Eastern Herzegovina, Bosanska Krajina, Romanija), and included five districts in northeastern SR BiH. It existed between September 1991 and 9 January 1992, when it became part of Republic of the Serb people of Bosnia and Herzegovina (later Republika Srpska).