Campbell County, Tennessee: History
Campbell County was formed in 1806 from parts of Anderson and Claiborne Counties. It was named in honor of Colonel Arthur Campbell, a member of the Virginia House of Burgesses and an officer during the American Revolutionary War.
New Mammoth Cave, located in Elk Valley, approximately 10 miles southwest of Jellico, was mined for saltpeter (the main ingredient of gunpowder) during the War of 1812. This cave possibly was also mined during the Civil War. In 1921, the cave was developed as a tourist attraction and was open to the public until at least 1928. Today, New Mammoth Cave is securely gated by the U.S. Fish and Wildlife Service. It is protected as a sanctuary for bats, including the federally endangered Indiana bat.
During the Civil War, the county's sympathies were predominantly with the Union. On June 8, 1861, voters in Campbell County rejected Tennessee's Ordinance of Secession by a vote of 1,094 to 60. On August 1, 1861, Campbell County became the first Tennessee county to form a Union Army unit for the Civil War, organizing Company B of the 1st Tennessee Infantry at Jacksboro.