Louisiana Purchase Treaty signed in Paris, doubling size of U.S. 210 years ago today (1803)

Video: 'The Louisiana Purchase in a Nutshell'

(Saturday, April 30, 1803) — On the authorization of President Thomas Jefferson, the United States purchased the Louisiana Territory from France today for 60 million francs, the equivalent of about $15 million, by signing the Louisiana Purchase Treaty in Paris. The move doubled the size of the U.S., adding 828,000 square miles to American territory.

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