In 1803, the United States made a deal to purchase a big area of land called the Lousiana Territory. Soon after, Meriwether Lewis and William Clark were asked to lead an expedition into the American Northwest to explore the new land. After the journey, many stories were told about it--but not all of them are true. Discover what's real and what's fiction about the expedition through infographics, primary sources, and expertly leveled text.