The Louisiana Purchase of 1803 doubled the size of the United States, expanding its territory westward. The map illustrates the new boundaries and includes a timeline of key events in U.S. expansion and reform from 1801 to 1861.

Map of the Louisiana Purchase in 1803, showing the expanded United States territory, with labels for the United States, Spain, Britain, Disputed territory, and Louisiana Purchase. The map includes geographical features like the Mississippi River, the Rocky Mountains, and the Gulf of Mexico. A timeline at the top highlights key events from 1801 to 1821, including the Louisiana Purchase, Lewis and Clark expedition, and the War of 1812. An illustration depicts Native Americans hunting bison on the Great Plains.