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
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