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
Assassination of Archduke Franz Ferdinand jumped into the Miljacka river. Čabrinović's suicide attempt failed, as the old cyanide only induced vomiting, and the Miljacka was only 13 cm deep due to the hot, dry summer. Police dragged Čabrinović out of the river, and he was severely beaten by the crowd before being taken into custody. The procession sped away towards the Town Hall leaving the disabled car behind. Cvjetko Popović, Gavrilo Princip, and Trifun Grabež failed to act as the motorcade passed them at high speed. Arriving at the Town Hall for a scheduled reception, Franz Ferdinand showed understandable signs of stress, interrupting a prepared