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 that Austria-Hungary had been an "occupier". Princip's weapon, along with the car in which the Archduke was riding, his bloodstained uniform and the chaise longue on which he died, are on permanent display in the Heeresgeschichtliches Museum in Vienna, Austria. The bullet fired by Gavrilo Princip, sometimes referred to as "the bullet that started World War I", is a museum exhibit in the Konopiště Castle near the town of Benešov in the Czech Republic. The bronze medallion of Ferdinand and Sophie, which was part of a monument that was erected on the site of the assassination and demolished in 1918