Assignment Discovery: America Enters World War I
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During World War I, America tried to remain neutral. However, once German submarines began attacking shipments from America, the United States declared war. Learn more about America entering World... (more info)

During World War I, America tried to remain neutral. However, once German submarines began attacking shipments from America, the United States declared war. Learn more about America entering World War I on Discovery Channel's "Assignment Discovery."

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