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
Partition of Bosnia and Herzegovina Partition of Bosnia and Herzegovina The partition of Bosnia and Herzegovina was discussed and attempted during the 20th century. The issue came to prominence during the Bosnian War, which also involved Bosnia and Herzegovina's largest neighbors, Croatia and Serbia. , the country remains one state while internal political divisions of Bosnia and Herzegovina based on the 1995 Dayton Agreement remain in place. Bosnia and Herzegovina has been a single entity occupying roughly the same territory since the rise of the medieval Kingdom of Bosnia and the subsequent Ottoman conquest of Bosnia between the 1380s and 1590s. The borders of today's