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
Bulletproof vest an attacker. By 1900, US gangsters were wearing $800 silk vests to protect themselves. On 28 June 1914, Archduke Franz Ferdinand of Austria, heir to the throne of Austria-Hungary was fatally shot, triggering World War I; despite owning a silk bulletproof vest, which tests by Britain's Royal Armouries indicate would likely have stopped a bullet of that era, and despite being aware of potential threats to his life including an attempted assassination of his uncle a few years earlier, Ferdinand was not wearing his on that fateful day. The combatants of World War I started the war without any attempt