On June 28. 1914, Archduke Franz Ferdinand of Austria, heir to the Austro-Hungarian throne, and his wife Sophie, Duchess of Hohenberg were killed in Sarajevo, Bosnia and Herzegovina, by Gavrilo Princip, a high school student, originally from Obljaja hamlet, near Bosansko Grahovo, a member of the Bosnian nationalist group the Young Bosnia.
On July 10, of the same year, the Austro-Hungary Monarchy declared a war against Serbia, marking the beginning of World War I.
The event, known as the Assassination in Sarajevo, was one of the casus bellis of World War I.
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