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
French entry into World War I was not sincere in seeking peace. The French consensus was that war was inevitable. The war arose from conflict between two alliances: the Triple Alliance of Germany, Austria and Italy, and the Triple Entente of France, Russia and Britain. France had had a military alliance with Russia since 1894, designed primarily to neutralize the German threat to both countries. Germany had a military alliance with Austria-Hungary. In June 1914, Archduke Franz Ferdinand, the heir to the Austrian throne, was assassinated. The government of Austria decided to destroy Serbia once and for all, for stirring up trouble among ethnic Slavs. Berlin