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To answer the question literally, the United States was "discovered" when the Constitution was ratified in 1788 and the first President and Congress was installed in 1789.

The Americas were discovered by Asian nomads who crossed the Bering Land Bridge, anywhere from 12,500 BCE to 40,000 BCE. The Vikings established colonies in the Americas in the 11th century, most notably in Newfoundland (Leif Erikson) and Greenland. Christopher Columbus' discovery of the Americas brought the New World to the attention of Europe.

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17y ago

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