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
Archduke Joseph Franz of Austria Archduke Joseph Franz of Austria Archduke Joseph Franz Leopold of Austria (9 April 1799 – 30 June 1807) was the second son and seventh child of Francis II, the last Holy Roman Emperor and his second wife, Maria Theresa of Naples and Sicily, daughter of Ferdinand I of the Two Sicilies and his wife Maria Carolina of Austria. He was their fourth child to die. Archduke Joseph Franz was born at the Hofburg Imperial Palace, where all of his older and younger siblings were born. He was the seventh child born to his parents: Marie Louise was born in 1791,