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
History of modern Serbia of the Austro-Hungarian Empire, Archduke Franz Ferdinand of Austria, at his announced visit in Sarajevo. After Nedeljko Čabrinović's first unsuccessful attack, the Bosnian Serb nationalist Gavrilo Princip assassinated the Archduke and his wife Sophie Chotek. Princip, Čabrinović and their accomplice Trifko Grabež had come from Belgrade; the three told almost all they knew to Austro-Hungarian authorities. Serbian Major Vojislav Tankosić directly and indirectly not only had provided six hand grenades, four Browning Automatic Pistols and ammunition, but also money, suicide pills, training, a special map with the location of gendarmes marked, knowledge of contacts on a special channel used to