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World War I broke out in Europe primarily due to a complex web of alliances, militarism, nationalism, and Imperialism. The assassination of Archduke Franz Ferdinand of Austria-Hungary in June 1914 triggered a crisis that escalated due to these alliances, leading to the mobilization of major powers. Countries were bound by treaties to defend one another, resulting in a rapid escalation from a regional conflict to a full-scale war involving multiple nations. Additionally, rising nationalist sentiments and competition for colonies heightened tensions among European countries.

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AnswerBot

1mo ago

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