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
Petar Kočić who was awarded the Nobel Prize in Literature in 1961. Kočić's cause was also taken up by South Slav nationalists such as Gavrilo Princip, the Young Bosnian who assassinated Archduke Franz Ferdinand of Austria in June 1914, precipitating the July Crisis and the outbreak of World War I. Young revolutionaries, Butler writes, "learned from Kočić's example that Bosnia could not be freed through the law and the courts." The radical land reforms advocated by Kočić only came to fruition after World War I, following the collapse of Austria-Hungary and the creation of the Kingdom of Serbs, Croats and Slovenes, which