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 Leopold Ludwig of Austria Archduke Leopold Ludwig of Austria Archduke Leopold Ludwig of Austria (German: Leopold Ludwig Maria Franz Julius Estorgius Gerhard Erzherzog von Ósterreich) (b. Milan 6 June 1823 – d. Hórnstein 24 May 1898) was an Austrian general and admiral. He was the eldest son of Archduke Rainer Joseph of Austria (1783–1853) and Princess Elisabeth of Savoy (1800–1856) and a grandson of Emperor Leopold II. Leopold Ludwig was born in 1823 in Milan, where his father served as Viceroy of Lombardy-Venetia from 1818 to 1848. A younger brother, Archduke Rainer Ferdinand (1827–1913), served as Austrian Minister President from 1859 to 1861. Leopold