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
Croats of Bosnia and Herzegovina would include a federal unit with a Croatian majority. It remains the permanent aspiration of the Croatian people of Bosnia and Herzegovina." Currently, there are several Croatian political parties in Bosnia and Herzegovina, many corresponding to parties within Croatia itself. The Croatian Democratic Union of Bosnia and Herzegovina (HDZ BiH), Croatian Democratic Union 1990 (HDZ 1990) are the most popular parties. HDZ was founded in 1990 and is major political parties among Bosnian Croats, being the most powerful during the Bosnian War (1992–1995) and existence of the Croatian Republic of Herzeg-Bosnia (1991–1994). HDZ is Christian democratic, conservative and pro-Europeanist political