Causes of World War I corrective." British Diplomat Arthur Nicolson wrote in May 1914, “Since I have been at the Foreign Office I have not seen such calm waters.” On 28 June 1914, Archduke Franz Ferdinand of Austria, heir presumptive to the Austro-Hungarian throne, and his wife, Sophie, Duchess of Hohenberg, were shot dead, by two gun shots in Sarajevo by Gavrilo Princip, one of a group of six assassins (five Serbs and one Bosniak) coordinated by Danilo Ilić, a Bosnian Serb and a member of the Black Hand secret society. The assassination is significant because it was perceived by Austria-Hungary as an existential challenge
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