What territory did the United States buy from France in 1803?

The territory that the United States bought from France in 1803 is commonly known as the Louisiana Purchase. This acquisition expanded the United States' territorial holdings significantly. The Louisiana Purchase encompassed a vast area of land, comprising approximately 828,000 square miles (2.14 million square kilometers), and it stretched from the Mississippi River in the east to the Rocky Mountains in the west, covering parts of present-day 15 U.S. states and two Canadian provinces. The purchase was negotiated with France by President Thomas Jefferson's administration and doubled the size of the United States at that time, marking a significant milestone in the nation's westward expansion.