The Louisiana Purchase of 1803 introduced about 828,000,000 square miles of territory from France into the United States, thereby doubling the size of the young republic.
https://www.history.com/topics/19th-century/louisiana-purchase
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The Louisiana Purchase of 1803 introduced about 828,000,000 square miles of territory from France into the United States, thereby doubling the size of the young republic.
https://www.history.com/topics/19th-century/louisiana-purchase
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