The United States bought the Louisiana Territory from France in 1803. After the U.S. gained independence, many Americans believed that the country should expand. In 1803, President Thomas Jefferson bought the Louisiana Territory for $15 million. This land doubled the size of the United States. American Indians and European settlers lived on this land. After the United States bought the Louisiana Territory, many more settlers moved west.
Section "Learn and Explore" uses official instructions and media files of US Citizenship and Immigration Services, US National Museum of American History, The Smithsonian Institution and other governmental and public organization.