北西インディアン戦争
Born in Aquasco, Prince George's County, in what was then the British Province of Maryland, Leonard Covington joined the United States Army as a Cornet in March 1792. He was promoted to Captain in 1794 and served in the Northwest Indian War (1785–1795) under Anthony Wayne, where he distinguished himself at Fort Recovery and the Battle of Fallen Timbers. He resigned from the military at the conclusion of the Northwest Indian War.