Bulgaria during World War I 28 June 1914, Gavrilo Princip, a Bosnian-Serb student and member of Young Bosnia, assassinated the heir to the Austro-Hungarian throne, the Archduke Franz Ferdinand of Austria in Sarajevo, Bosnia. This began a period of diplomatic manoeuvring between Austria-Hungary, Germany, Russia, France and Britain called the July Crisis. Wanting to end Serbian interference in Bosnia conclusively, Austria-Hungary delivered the July Ultimatum to Serbia, a series of ten demands that were intentionally meant to be unacceptable in order to precipitate a war with Serbia. When Serbia acceded to only eight of the ten demands levied against it in the ultimatum, Austria-Hungary declared
Oskar Potiorek Oskar Potiorek Oskar Potiorek (20 November 1853 – 17 December 1933) was an officer of the Austro-Hungarian Army, who served as Governor of Bosnia and Herzegovina from 1911 to 1914. He was a passenger in the car carrying Archduke Franz Ferdinand of Austria and his wife Duchess Sophie of Hohenberg when they were assassinated in Sarajevo on 28 June 1914. In the following World War I, Potiorek commanded the Austro-Hungarian forces in the Serbian Campaign of 1914/15. Born in Bad Bleiberg, Carinthia the son of a mining official, Potiorek attended the Imperial and Royal military institute of technology and the