The Louisiana Purchase: From Independence to Lewis and Clark

When the United States won its independence from Great Britain, it also won new lands. Soon, the Louisiana Purchase doubled the country's size. These new lands had to be explored and settled. Brave explorers, such as Lewis and Clark, soon blazed a trail to the West. How did the United States grow after the American Revolution? Why did Thomas Jefferson buy Louisiana from France? What did Lewis and Clark discover on their journey?