Serbian Campaign of World War I Serbia, Montenegro, and Greece. When Bulgaria attacked both Serbia and Greece on 16 June 1913, it lost most of its Macedonian region to those countries, and additionally the Southern Dobruja region to Romania and Adrianople (the present-day city of Edirne) to Turkey in the 33-day Second Balkan War, which further destabilized the region. On 28 June 1914, Gavrilo Princip, a Bosnian Serb student and member of a multi-ethnic organisation of national revolutionaries called Young Bosnia, assassinated Archduke Franz Ferdinand of Austria, the heir to the Austro-Hungarian throne, in Sarajevo, Bosnia. The political objective of the assassination was the independence of
Archduke Franz Ferdinand of Austria Hohenzollern-Hechingen, and Liechtenstein. One of Sophie's direct ancestors was Albert IV, Count of Habsburg; she was descended from Elisabeth of Habsburg, a sister of King Rudolf I of Germany. Franz Ferdinand was also a descendant of King Rudolf I. Deeply in love, Franz Ferdinand refused to consider marrying anyone else. Finally, in 1899, Emperor Franz Joseph agreed to permit Franz Ferdinand to marry Sophie, on the condition that the marriage would be morganatic and that their descendants would not have succession rights to the throne. Sophie would not share her husband's rank, title, precedence, or privileges; as such, she would