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
Greek Catholic Church of Croatia and Serbia the local Latin Bishops, so the jurisdiction of "Apostolic Exarchate of Serbia and Montenegro" was reduced to Serbia only. The liturgy is the Slavonic form of Byzantine Rite, using the Old Church Slavonic language and the Cyrillic alphabet. The Eparchy of Križevci reported for the year 2010 a total of 21,509 faithful (in Croatia, Slovenia, and Bosnia-Herzegovina). At that time, the "Apostolic Exarchate for Serbia and Montenegro" reported 22,369 faithful. Greek Catholic Church of Croatia and Serbia The Greek Catholic Church of Croatia, Slovenia, Bosnia-Herzegovina and Serbia is an Eastern Catholic Church "sui iuris" of the Byzantine Rite which is