Veljko Čubrilović Veljko Čubrilović Veljko Čubrilović (Serbian Cyrillic: Вељко Чубриловић; 6 June 1886 – 3 February 1915) was a Bosnian Serb who was involved in the assassination of Archduke Franz Ferdinand of Austria. He was born in Gradiška, Bosnia and Herzegovina and became a schoolteacher in Priboj Majevički. In 1914, as a member of the Black Hand secret society, he agreed to help Gavrilo Princip, Nedeljko Čabrinović, and Trifko Grabež assassinate Archduke Franz Ferdinand. His brother, Vaso Čubrilović, was also involved in the plot. On Sunday, 28 June 1914, Franz Ferdinand and Sophie von Chotkova were assassinated by Gavrilo Princip. Princip and
Young Bosnia the arms and assassins into Sarajevo. ""The political union of the Yugoslavs [..] was my basic idea [..] I am a Yugoslav nationalist, aiming for the unification of all Yugoslavs, and I do not care what form of state, but it must be free from Austria""<br>-Gavrilo Princip during his trial Claimed members of Young Bosnia who participated in the assassination were: An evening before the assassination of Archduke Franz Ferdinand, Princip, Čabrinović and Ilić visited the grave of Bogdan Žerajić for the last time. Žerajić's proclamation "He who wants to live, let him die. He who wants to die, let