The Louisiana Purchase Treaty

The Louisiana Purchase (French: Vente de la Louisiane "Sale of Louisiana") was the acquisition by the United States of America of 828,800 square miles (2,147,000 km2) of France's claim to the territory of Louisiana in 1803. The U.S. paid 60 million francs ($11,250,000) plus cancellation of debts worth 18 million francs ($3,750,000), for a total sum of 15 million dollars (less than 3 cents per acre) for the Louisiana territory ($219 million in 2010 dollars, less than 42 cents per acre).

The L...