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Most of them were processed in Ellis island. They had to be processed there before they could enter the country.
The Cold War developed in the Soviet Union, Europe, and the United States due, in large part, to the competition over the arms race and over scientific advancement during the 1970s and 1980s. The Soviet Union pursued communist ideas while the United States and Western Europe followed democratic principles. The Cold War developed as each built up it's military to protect and advance it's own ideology.
Corroborating sources allows a historian to increase the reliability of the information at hand. Having multiple sources in agreement makes it less likely for discrepancy
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Total war on soldiers and southern sympathizers... His goal was to destroy the morale of the south. He wanted all southerners to feel the wrath of war. They looted, ruined, and burned all they could not take. His march was both brutal and relentless. He showed no mercy and made thoroughly sure every citizen was horrified and miserable.