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
Anti-Serb riots in Sarajevo of citizens of Bosnia and Herzegovina because of their ethnicity, and, as Slovene author Velikonja describes, an ominous harbinger of things to come. Anti-Serb riots in Sarajevo The anti-Serb riots in Sarajevo consisted of large-scale anti-Serb violence in Sarajevo on 28 and 29 June 1914 following the assassination of Archduke Franz Ferdinand. Encouraged by the Austro-Hungarian government, the violent demonstrations assumed the characteristics of a pogrom, leading to ethnic divisions unprecedented in the city's history. Two Serbs were killed on the first day of the demonstrations, and many were attacked, while numerous houses, shops and institutions owned by Serbs were