Statistics for occurrence #1 of “Territory of Louisiana” in entry united-states-of-america-missouri of Harper's Encyclopedia of United States History:

.....March 26, 1804 Exploring expedition of Lewis and Clarke up the Missouri River leaves St. Louis......May 14, 1804 By act of Congress the district of Louisiana is regularly organized into the Territory of Louisiana , and President Jefferson appoints Gen. James Wilkinson as governor......March 3, 1805 Aaron Burr visits General Wilkinson at St. Louis......September, 1805 Lewis and Clarke expedition return ...
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