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It’s 1914. Europe looks stable on the surface. Powerful empires, growing economies, and rapid technological progress. But underneath, tensions have been building for decades. Then, on June 28, 1914, a single event triggered a chain reaction that pulled the world into one of the deadliest conflicts in history. This is the story of World War I. Not just how it started, but how it unfolded, year by year, and why it changed the world forever.