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The Monroe Doctrine is the best known U.S. policy toward the Western Hemisphere. Buried in a routine annual message delivered to Congress by President James Monroe in December 1823, the doctrine warns European nations that the United States would not tolerate further colonization or puppet monarchs.
Generally speaking, during the Industrial Revolution, the workers that supplied labor in factories and mines were known as the "urban working class", since most of the factory work was done in or around city centers.
An Lushan led the rebellion.
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The answer is false the fertile crescent encompasses the best crop growing regions of ancient Mesopotamia hence the word fertile.