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 Joseph Árpád of Austria Archduke Joseph Árpád of Austria Archduke Joseph Árpád Benedikt Ferdinand Franz Maria Gabriel (; 8 February 1933 – 30 April 2017) was a member of the Hungarian Palatine branch of the House of Habsburg-Lorraine. He was born in Budapest, the son of Archduke Joseph Francis of Austria and his wife, Princess Anna of Saxony. He was the great-grandson of Archduchess Gisela of Austria. He received a degree in economics from the University of Lisbon. Joseph married Princess Maria von Löwenstein-Wertheim-Rosenberg, born 1935, daughter of Karl, 8th Prince of Löwenstein-Wertheim-Rosenberg and Carolina dei Conti Rignon. They married civilly on 25 August