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Trench warfare is a type of land warfare using occupied fighting lines consisting largely of trenches, in which troops are significantly protected.
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The Great Migration was the movement of 6 million African Americans out of the rural Southern United States to the urban Northeast Midwest and West that occurred between 1916 and 1970.
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The Espionage act was extended by May 16, 1918 which prohibited
forms of speech. It also included disloyal, profane, scurrilous, and abusive language. -
The term was popularized by the media shortly after a press conference given on June 18, 1971 and after that President Nixon declared drugs abuse.
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Ia federal law intended to check the president's power to commit the United States to an armed conflict without the consent of the U.S. Congress.