April 1917: America entered the first World War | Article | The United States Army
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An Exclusive Preview of the New World War I Memorial | History | Smithsonian Magazine
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World War 1 - A Short Timeline of 1915
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World War I
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World War 1 begins July 28, 1914 | St. Tammany Parish Library
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What Was World War I? by Nico Medina, Who HQ: 9780593521656 | PenguinRandomHouse.com: Books
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