What event is a major cause of World War I? 🔊
A major cause of World War I was the complex system of alliances between European powers, particularly the Triple Alliance (Germany, Austria-Hungary, and Italy) and the Triple Entente (France, Russia, and Britain). Tensions were heightened by militarism, nationalism, and imperial competition. The assassination of Archduke Franz Ferdinand of Austria in June 1914 acted as a catalyst, triggering a series of diplomatic crises. Countries mobilized in defense of their allies, leading to a rapid escalation into a full-scale war. Nationalistic fervor and long-standing rivalries contributed significantly to the outbreak of hostilities.


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