On This Date in Minnesota History: April 30

April 30, 1803 - “By a treaty signed on [this date], the United States purchased from France the Louisiana Territory, more than 2 million sq km (800,000 sq mi) of land extending from the Mississippi River to the Rocky Mountains. The price was 60 million francs, about $15 million; $11,250,000 was to be paid directly, with the balance to be covered by the assumption by the United States of French debts to American citizens.”
http://www.gatewayno.com/history/LaPurchase.html