Archduke Franz Ferdinand of Austria Ferdinand and his wife with a lying in state aboard SMS "Viribus Unitis". On Sunday, 28 June 1914, at about 10:45 am, Franz Ferdinand and his wife were assassinated in Sarajevo, the capital of the Austro-Hungarian province of Bosnia and Herzegovina. The perpetrator was 19-year-old Gavrilo Princip, a member of Young Bosnia and one of a group of assassins organized and armed by the Black Hand. Earlier in the day, the couple had been attacked by Nedeljko Čabrinović, who had thrown a grenade at their car. However, the bomb detonated behind them, injuring the occupants in the following car. On
Battle of Kolubara their respective commands, and the 5th and 6th armies were merged into a single 5th Army of 95,000 men. On 28 June 1914, Bosnian Serb student Gavrilo Princip assassinated Archduke Franz Ferdinand of Austria in Sarajevo. The assassination precipitated the July Crisis, which led Austria-Hungary to issue an ultimatum to Serbia on 23 July on suspicion that the assassination had been planned in Belgrade. The Austro-Hungarian government made the ultimatum intentionally unacceptable to Serbia, and it was indeed rejected. The Austro-Hungarians declared war on Serbia on 28 July and that same day the Serbs destroyed all bridges on the Sava