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
Ferdinand II, Archduke of Austria Ferdinand II, Archduke of Austria Ferdinand II, Archduke of Further Austria (Linz, 14 June 1529 – 24 January 1595, Innsbruck) was ruler of Further Austria including Tirol. The son of Ferdinand I, Holy Roman Emperor, he was married to Philippine Welser in his first marriage. In his second marriage to Anna Juliana Gonzaga, he was the father of Anna of Tyrol, the would-be Holy Roman Empress. Archduke Ferdinand of Austria was the second son of Ferdinand I, Holy Roman Emperor and Anna of Bohemia and Hungary. He was a younger brother of Emperor Maximilian II. At the behest of his