In 1803, when was President of the United States, the U.S. purchased the Louisiana Territory from
       France. This was a huge area of over 800,000 square miles, taking in nearly the entire mid-section of
       North America from present-day Texas and Louisiana up to Montana and North Dakota. This almost
       doubled the size of the United States. The President Choose two brave souls to explore the area for the first time
those two people where Lewis and Clark