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
Bosnia and Herzegovina "Herceg (Herzog) of Hum and the Coast" (1448). Hum, formerly Zahumlje, was an early medieval principality that was conquered by the Bosnian Banate in the first half of the 14th century. The region was administered by the Ottomans as the Sanjak of Herzegovina ("Hersek") within the Eyalet of Bosnia up until the formation of the short-lived Herzegovina Eyalet in the 1830s, which remerged in the 1850s, after which the entity became commonly known as "Bosnia and Herzegovina". On initial proclamation of independence in 1992, the country's official name was the Republic of Bosnia and Herzegovina but following the 1995 Dayton