The United States of America , consists of 50 states, a federal district, five major unincorporated territories, 326 Indian reservations, and nine minor outlying islands. Paleo-Indians migrated from Siberia to the North American mainland at least 12,000 years ago, and European colonization began in the 16th century. The United States emerged from the Thirteen British Colonies established along the East Coast. led to the American Revolutionary War (1775–1783), which established the nation's independence
Economy: The United States is a developed country with a market economy and has the world's largest nominal GDP and net wealth. It has the second-largest by purchasing power parity (PPP) behind China. It had the world's ninth-highest per capita GDP (nominal) and the fifteenth-highest per capita GDP (PPP) in 2021. The United States has the most technologically powerful and innovation.
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