Skip to main content
Close

Welcome to the new Annenberg Learner website! All of the current series have migrated to our new, streamlined interface. The legacy site is available at archive.learner.org through January 31, 2020.

Close
Menu

A Biography of America

Westward Expansion: Key Events

1803

U.S. purchases Louisiana Territory from France

1804 - 1806

Lewis and Clark explore Lousiana Territory

1808

Congress bans importation of slaves to the U.S.

Units