Which event triggered the outbreak of World War I?
A) Discovery of anti-Austrian messages of the Black Hand Society
B) A violent border clash of customs agents
C) A belligerent telegram of Kaiser Wilhelm to the Russian tsar
D) The internal crisis of Bosnia
E) The assassination of the Archduke Francis Ferdinand

Question

Quizplus · Accepted Answer

The assassination of Archduke Francis Ferdinand, heir to the throne of Austria-Hungary, by a member of a Serbian nationalist group in Sarajevo on June 28, 1914, triggered a diplomatic and military crisis that ultimately led to the outbreak of World War I.

Which Event Triggered the Outbreak of World War I