World War I and beyond. On 28 June 1914, Archduke Franz Ferdinand, heir presumptive to the Austro-Hungarian Empire, visited the Bosnian capital, Sarajevo. A group of six assassins (Cvjetko Popović, Gavrilo Princip, Muhamed Mehmedbašić, Nedeljko Čabrinović, Trifko Grabež, and Vaso Čubrilović) from the Yugoslavist group Mlada Bosna, supplied with arms by the Serbian Black Hand, gathered on the street where the Archduke's motorcade was to pass, with the intention of assassinating him. The political objective of the assassination was to break off Austria-Hungary's South Slav provinces, which Austria-Hungary had annexated from the Ottoman Empire, so they could be combined into a Yugoslavia. Čabrinović
Serbs of Croatia of the World War I, all organizations that the government considered favored unification of South Slavs or Serbia, which was on the side of the Allied Powers, were banned. Josip Frank's associates took advantage of some provocations and the anger of the people after the assassination of Archduke Franz Ferdinand by Serb Gavrilo Princip and organized anti-Serbian demonstrations. After a stone was thrown on a parade in which the image of Franz Ferdinand was carried true Zagreb, many cafés and gathering places of pro-Yugoslav politicians as well as Serb-owned shops were demolished. Croat-Serb Coalition MP's were also attacked. On the