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
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