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
Article 231 of the Treaty of Versailles article—later regretted the wording used, believing it further aggravated the German people. The historical consensus is that responsibility or guilt for the war was not attached to the article. Rather, the clause was a prerequisite to allow a legal basis to be laid out for the reparation payments that were to be made. Historians have also highlighted the unintended damage created by the clause, which caused anger and resentment amongst the German population. On 28 June 1914 the Bosnian-Serb Gavrilo Princip assassinated the heir to the throne of Austria-Hungary, Archduke Franz Ferdinand, in the name of Serbian nationalism. This caused