that the monarchy would be composed of empire of Austria, kingdom of Hungary and kingdom of Croatia. In Croatia the most prominent advocates of the idea were Dr. Nikola Zvonimir Bjelovučić, author of the book Trialism and the Croatian state, Dr. Ivo Pilar, historian, politician and K.u.K. officer who advocated the idea of trialism in his book The South Slav Question, Dr. Aleksandar Horvat, leader of the pro-monarchy Pure Party of Rights and Croatian delegate at the signing of the trialist treaty in Vienna and Budapest 1918. Other proponents of the idea included General Stjepan Sarkotić, Field marshal Svetozar Borojević, Ivo Prodan, archbishop Josip Štadler, generals Luka Šnjarić and Mihael Mihaljević. Nikola Zvonimir Bjelovučić's proposed trialist monarchy (1911) would be named Austro-Hungaro-Croatian monarchy, and every emperor and king would have to be separately crowned in Austria, Hungary and Croatia. Common affairs in Austro-Hungaro-Croatia would include a ministry of navy headquartered in Pula; an independent army for every state in the monarchy with its own language and officer cadre; a foreign affairs ministry equally staffed and financed by each of the states; and a parliament equally representing each state. According to Bjelovučić the Croatian kingdom would comprise the Slovene Lands, Istria, Rijeka, Croatia-Slavonia, Dalmatia, Bosnia and Herzegovina. Trieste with western Istria would form an autonomous region in the kingdom. In that region the Italians would be in a political sense equal to Croats. In the Croatian kingdom Croats and Serbs (with Muslims) would enjoy national freedom especially in the local administration. Special provisions would be made for languages, education and religions in the Croatian kingdom. According to Bjelovučić's proposal, Croatia would host a total of six 'Royal Croatian' government ministries. Among the Habsburg family the supporters of reorganizing the empire from a dualist to a trialist one included Archduke Leopold Salvator who served as an artillery officer in Zagreb 1894–1900, Crown Prince Rudolf who supported federalization of the monarchy, and Archduke Franz Ferdinand, who was the most prominent trialist supporter which made him a great threat to the Serbian nationalists and led to the assassination in Sarajevo. During his short reign Emperor and King Karl I & IV supported the trialist concept and advocated the reorganization of the monarchy. World War I Croatian delegations attempted to attain trialism throughout the entire World War I, but even though they had support from emperor Karl I (IV), they were always declined and vetoed