The United States of America (Also known as the United States of America, USA ,US, America) is a country located in North America. It was established on July 4, 1776 after the 13 Colonies declared independence from Great Britain. The Untied States continued to grow adding more states with Alaska and Hawaii added in 1949. The United States became a world power in 1900, and participated in the Cold War with the Soviet Union (USSR.) When the Soviet Union fell in 1991, the United States was the world's sole power.
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