Trifko Grabež society. For the next two years he spent most of his spare time with other nationalists who favoured a union between Bosnia and Herzegovina and Serbia. When it was announced that Archduke Franz Ferdinand, the heir to the throne of Austro-Hungarian Empire, was going to visit Bosnia and Herzegovina in June 1914, Colonel Dragutin Dimitrijević, the chief of the Intelligence Department in the Serbian Army and head of the Black Hand, sent seven men, Grabež, Nedeljko Čabrinović, Vaso Čubrilović, Cvjetko Popović, Danilo Ilić, Muhamed Mehmedbašić and Gavrilo Princip to Sarajevo to assassinate him. Each man was given either a revolver
Assassination of Archduke Franz Ferdinand Franz Ferdinand in Bosnia. On 21 June, Ambassador Jovanović met with Austro-Hungarian Finance Minister Bilinski. According to Serbian Military Attaché to Vienna, Colonel Lesanin, Ambassador Jovanović, spoke to Bilinski and "...stressed in general terms the risks the Archduke heir apparent might run from the inflamed public opinion in Bosnia and Serbia. Some serious personal misadventure might befall him. His journey might give rise to incidents and demonstrations that Serbia would deprecate but that would have fatal repercussions on Austro-Serbian relations." Jovanović came back from the meeting with Bilinski and told Lesanin that "...Bilinski showed no sign of attaching great importance