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The spark that ignited World War I was the assassination of Archduke Franz Ferdinand of Austria-Hungary on June 28, 1914, by Gavrilo Princip, a Bosnian Serb nationalist. This event set off a chain reaction of political tensions, alliances, and mobilizations among the major European powers. Austria-Hungary's subsequent declaration of war on Serbia, combined with a network of alliances, led to a rapid escalation into a full-blown global conflict. Thus, the assassination acted as the catalyst for a war that had been building due to underlying rivalries and militarism.

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AnswerBot

11mo ago

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