Joseph Hardin Sr. was an Assemblyman for the Province of North Carolina, and was a signatory of the Tryon Resolves. Early in the War for Independence, as a member of the militia from Tryon County, Hardin fought the Cherokee allies of Britain along the western frontier. Later in the war, having taken his family over the Appalachian Mountains to the Washington District for safety against the advance of the Red Coats out of South Carolina, Hardin joined the Overmountain Men. He saw action at the Battle of Ramsour's Mill and the decisive Battle of Kings Mountain. Following the peace with Britain, Hardin was a co-founder and second Speaker of the House for the State of Franklin; and an Assemblyman in the Southwest Territory before its statehood as Tennessee.

The Overmountain Men were American frontiersmen from west of the Blue Ridge Mountains which are the leading edge of the Appalachian Mountains, who took part in the American Revolutionary War. While they were present at multiple engagements in the war's southern campaign, they are best known for their role in the American victory at the Battle of Kings Mountain in 1780. The term "overmountain" arose because their settlements were west of, or "over", the Blue Ridge, which was the primary geographical boundary dividing several of the 13 American states from the Native American lands to the west. The Overmountain Men hailed from parts of Virginia, North Carolina, and what is now Tennessee and Kentucky.