fort loudoun was a british colonial-era fort located in what is now monroe county, tennessee, united states. built in 1756 and 1757 to help garner cherokee support for the british at the outset of the seven years' war, the fort was one of the first significant british outposts west of the appalachian mountains. the fort was designed by john william g. de brahm, its construction was supervised by captain raymond demeré, and its garrison was commanded by demeré's brother, paul demeré. it was named for the earl of loudoun, the commander of british forces in north america at the time.