World War I
The assassination of Archduke Franz Ferdinand of Austria on June 28, 1914, was a pivotal event that triggered the outbreak of World War I. He was killed in Sarajevo by Gavrilo Princip, a member of the nationalist group known as the Black Hand, which sought to promote Slavic nationalism and oppose Austro-Hungarian rule in the Balkans. This act set off a chain reaction of political tensions and alliances, leading to a declaration of war among the major powers of Europe.
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