The United States of America, also referred to as the United States, U.S.A., U.S., America, or the States, is a federal republic in central North America, stretching from the Atlantic coast in the east to the Pacific Ocean in the west.
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It shares land borders with Canada in the north and Mexico in the south, shares a marine border with Russia in the west, and has a collection of districts, territories, and possessions around the world including the states of Alaska and Hawaii. The country has fifty states, which have a level of local autonomy according to the system of federalism.
