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
Demographic history of Bosnia and Herzegovina Statistics in Belgrade composed a figure of 179,173 persons killed in the war in Bosnia and Herzegovina during the Second World War: By the plans of Nazi Germany and the Independent State of Croatia 110,000 Serbs were relocated and transported to German-occupied Serbia. Just in the period of May to August 1941 over 100,000 Serbs were expelled to Serbia. In the heat of war Serbia had 200,000-400,000 Serbian refugees from Ustaša-held Bosnia and Herzegovina. By the end of war 137,000 Serbs have permanently left the territories of Bosnia and Herzegovina. The Muslim population of Bosnia and Herzegovina was also exposed