Early history of Bosnia and Herzegovina blocks. Daors made unique bronze coins and sculptures. Conflict between the Illyrians and ancient Romans started in 229 BC. In the year 168 BC, the land of Illyrians became the Roman province of Illyricum. Rome complete its annexation of the region in 9, ending a three-year rebellion of Illyrians against Romans. In year 10, Illyria was divided and the northern strip of today's Bosnia along the south side of the Sava River became part of the new province of Pannonia. The rest of what is today Bosnia, Herzegovina, Montenegro, Dalmatia, and western Serbia became part of the Roman province of
Socialist Republic of Bosnia and Herzegovina divided among banovinas. When SR Bosnia and Herzegovina was formed, it included what were the territories of most of Vrbas Banovina, the western part of Drina Banovina, the northwestern part of Zeta Banovina, and the eastern parts of Banovina of Croatia. During a meeting of the State Anti-fascist Council for the National Liberation of Bosnia and Herzegovina (ZAVNOBiH) in Mrkonjić Grad on 25 November 1943. In April 1945 its name was formalized as the Federal State of Bosnia and Herzegovina ( / Федерална Држава Босна и Херцеговина), a constituent unit of the Democratic Federal Yugoslavia. With DF Yugoslavia changing its