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Truman administration. In the decades after World War II, the United States became a global influence in economic, political, military, cultural, and technological affairs. Following World War II, the United States emerged as one of the two dominant superpowers, the Soviet Union being the other.
History of the United States is what happened in the past in the United States, a country in North America. Native Americans lived in the Americas for thousands of years. English people in 1607 went to the place now called Jamestown, Virginia .
Further information: History of the United States (1815–1849) and Territorial evolution of the United States. Animation showing the free/slave status of U.S. states and territories expansion, 1789–1861. The Louisiana Purchase (1803) from France nearly doubled the territory of the United States.
The State of New York becomes the 11th state to ratify the Constitution, July 26, 1788. A new government under the Constitution is formed on March 4, 1789. George Washington becomes the 1st president of the United States on April 30, 1789.
The history of the lands that became the United States began with the arrival of the first people in the Americas around 15,000 BC. Numerous indigenous cultures formed, and their societies were reorganized after the European colonization of North America in the late 15th century.
