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
Serbs of Bosnia and Herzegovina in opening and maintaining sokol and gymnastic clubs. Žakula was the initiator of the establishment of Serbian gymnastics society "Obilić" in Mostar and Sports and gymnastic society "Serbian soko" in Tuzla. Sokol societies were also established in another cities across the Bosnia and Herzegovina. In 1908, Austria-Hungary annexed Bosnia & Herzegovina, at this time majority Serb-inhabited, going against the directions of the Berlin Congress, which caused an uproar in Montenegro and Serbia. This Annexation crisis, was one of the reasons for later tensions which led to the eruption of WWI. The first parliamentary elections in Bosnia and Herzegovina were held