What is low-grade fever? A fever is an increase in the body temperature above normal. A low-grade fever is a mild elevation of the temperature above normal. Your temperature measurements fluctuate through the day and vary depending upon the site of measurement.
The Kingdom of France controlled the Louisiana territory from 1699 until it was ceded to Spain in 1762. Napoleon in 1800, hoping to re-establish an empire in North America, regained ownership of Louisiana.
Planning the Expedition. In 1803, when was President of the United States, the U.S. purchased the Louisiana Territory from France. This was a huge tract 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.