Croats of Bosnia and Herzegovina Dalmatian Croatia formed a united Croatian kingdom, which included Dalmatia and part of Bosnia and Herzegovina, Pannonia (eastern Slavonia and northeastern Bosnia), and Savia (western Slavonia). In 1102 Croatia entered into a union with the Kingdom of Hungary. After this, Bosnia, which was earlier part of the Kingdom of Croatia, started to disassociate with Croatia. At first, Bosnia became a separate principality under Ban Kulin who managed to solidify Bosnian autonomy at the expense of more powerful neighbours, but only in the 14th century did Bosnia become a formidable state. In the 14th century, King Tvrtko I conquered part of
Republic of Bosnia and Herzegovina Republic by the formation of the Federation of Bosnia and Herzegovina, a sub-state joint entity. In 1995, the Dayton Peace Accords joined the Federation of Bosnia and Herzegovina with the Serb entity, the Republika Srpska, from that point onward recognized formally as political sub-state entity without a right on secession, into the state of Bosnia and Herzegovina. The 1990 parliamentary elections led to a national assembly dominated by three ethnically based parties, which had formed a loose coalition to oust the communists from power. Croatia and Slovenia's subsequent declarations of independence and the warfare that ensued placed Bosnia and Herzegovina