Louisiana Purchase | Definition, Date, Cost, History, Map, States, Significance, & Facts

United States history verifiedCiteWhile every effort has been made to follow citation style rules, there may be some discrepancies.Please refer to the appropriate style manual or other sources if you have any questions.Select Citation Style FeedbackThank you for your feedbackOur editors will review what you’ve submitted and determine whether to revise the article. External Websites University of Maryland, Baltimore County - The Louisiana Purchase: Real Estate Deal of the Century? Khan Academy - The Louisiana Purchase and its exploration Kansapedia - Kansas State Historical Society - Louisiana Purchase Thomas Jefferson's Monticello - The Louisiana Purchase CALS Encyclopedia of Arkansas - Louisiana Purchase UShistory.org - Westward Expansion: The Louisiana Purchase Encyclopedia Virginia - Louisiana Purchase Library of Congress - The Louisiana Purchase GlobalSecurity.org - 1800-1803 - Napoleon's Louisiana Purchase United States History for Kids - Louisiana Purchase, 1803 Britannica Websit...