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
Agreement on Friendship and Cooperation between Bosnia and Herzegovina and Croatia the winter Bosniaks began leaving the HVO and joining the ARBiH which also began receiving supplies from Croatia. In May, HVO Major General Ante Roso declared that the only "legal military force" in HZ-HB was the HVO and that "all orders from the TO [Territorial Defense] command [of Bosnia and Herzegovina] are invalid, and are to be considered illegal on this territory". The Croatian government played a "double game" in Bosnia and Herzegovina and "a military solution required Bosnia as an ally, but a diplomatic solution required Bosnia as a victim". Tuđman's Croatian Democratic Union (HDZ) party held important positions