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 Albrecht Franz, Duke of Teschen Archduke Albrecht Franz, Duke of Teschen Albert Franz Josef Karl Friedrich Georg Hubert Maria, Archduke of Austria, Prince Royal of Hungary and Bohemia, Duke of Teschen (In German: "Erzherzog Albrecht Franz Josef Karl Friedrich Georg Hubert Maria von Österreich, Herzog von Teschen") – (24 July 1897 – 23 July 1955) was a member of the House of Habsburg and titular pretender to the Duchy of Teschen. Archduke Albrecht Franz was born in Vienna, Austria-Hungary, only son of Archduke Friedrich, Duke of Teschen (1856–1936, son of Archduke Karl Ferdinand of Austria and Archduchess Elisabeth Franziska of Austria) and his wife, Princess