The earliest people in the Americas probably were Asians who crossed the prehistoric land bridge across the Bering Strait. They were largely of Mongoloid ancestry.
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History of the United States. Starting from 13 English colonies on the Atlantic coast, the United States developed into an independent republic that eventually extended to the Pacific, with Alaska and Hawaii among its states.
In prehistoric times, a land bridge joined Alaska to Asia where the Bering Strait now lies.