The assassination of Archduke Franz Ferdinand of Austria and his wife by the hands of a Serbian nationalist in Sarajevo led to the Austrian-Hungarian Empire declaring war.
What was the reason behind assassination of Archduke Franz Ferdinand?
The assassination's political goal was to liberate Bosnia and Herzegovina from Austria-Hungarian rule and establish a common South Slav ("Yugoslav") state. The assassination triggered the July Crisis, which resulted in Austria-Hungary declaring war on Serbia and launching World War I.
The Austro-Hungarian ultimatum demanded that Serbia formally and publicly condemn "dangerous propaganda" against Austria-Hungary, the ultimate goal of which, according to the ultimatum, is to "detach from the Monarchy territories belonging to it."
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