The sale of the colony to the United States

At this same time in France, American diplomacy was very active. Dispatched by President Thomas Jefferson, Ambassador Livingston arrived in Paris in 1801. He corresponded with Talleyrand, and then Bonaparte, stating that the English would not tolerate a renewed French presence on the Mississippi, and recalling the United States' intentions: to take possession of Illinois, New Orleans and Florida.

Lettre from Bonaparte to Jefferson, April 23, 1803
AMAE, Bibliothèque, Correspondance de Napoléon, n° 6706 Lettre from Bonaparte to Jefferson, April 23, 1803
AMAE, Bibliothèque, Correspondance de Napoléon, n° 6706 Lettre from Bonaparte to Jefferson, April 23, 1803
AMAE, Bibliothèque, Correspondance de Napoléon, n° 6706
Lettre from Bonaparte to Jefferson, April 23, 1803
AMAE, Bibliothèque, Correspondance de Napoléon, n° 6706

The French owed the Americans twenty million francs. The Minister of the Treasury, Barbé-Marbois, negotiated a treaty of transfer with the American envoy Monroe. Under its terms, the US would be given the entire territory of Louisiana, even though Spain had not formally handed it over to France.

Map of Louisiana transferred to the United States 
François Barbé de Marbois, Histoire de la Louisiane et de la cession de cette colonie…, Paris, 1829.
AMAE, Paris, Bibliothèque, 48 A 36
Map of Louisiana transferred to the United States
François Barbé de Marbois, Histoire de la Louisiane et de la cession de cette colonie…, Paris, 1829.
AMAE, Paris, Bibliothèque, 48 A 36

At the end of April 1803, when Laussat had been in place for less than two months, Louisiana was sold to the United States for the sum of eighty million francs, minus the twenty million francs in reparations owed by France for piracy against American ships in the 1790s

Laussat's second proclamation to the Louisianans, November 1803
CAOM, C13A 52, f° 168
Laussat's second proclamation to the Louisianans, November 1803

CAOM, C13A 52, f° 168

Louisiana was given to France by Spain on November 30th, and transferred again to the United States on December 20th, on both occasions without consulting the local populations.

the Louisiana Purchase