Louisiana Purchase Treaty

Jefferson Expands The Nation
Largest Single Land Purchase in U.S. History

For President Thomas Jefferson it was a diplomatic and political triumph. In one fell swoop the purchase of Louisiana ended any threat of war with France and opened up the land west of the Mississippi to settlement.

Initially Jefferson, through his Minister to France, Robert Livingston, offered Napoleon $2 million for a small tract of land on the lower Mississippi. There Americans could build their own seaport. Impatient at the lack of news, Jefferson sent James Monroe to Paris to offer $10 million for New Orleans and West Florida. Almost at the same time, and unbeknownst to Jefferson, France had offered all of Louisiana to Livingston for $15 million.By any measure the purchase of Louisiana was the most important action of Jefferson’s two terms as president. Jefferson knew that acquiring the very heart of the American continent would prove to be the key to the future of the United States.

Though the transaction was quickly sealed, there were those who objected to the purchase on the grounds that the Constitution did not provide for purchasing territory. However, Jefferson temporarily set aside his idealism to tell his supporters in Congress that “what is practicable must often control what is pure theory.” The majority agreed.

Jefferson later admitted that he had stretched his power “till it cracked” in order to buy Louisiana, the largest single land purchase in American history. As a result, generations of Americans for nearly 200 years have been the beneficiaries of Jefferson’s noble vision of America and his efforts at expanding the continent.

The People, Places and Events In America's Founding Years