[1] The efforts of the Overmountain Men helped to solidify the existence of the fragile settlements in the Watauga, Nolichucky, and Holston river valleys, the legitimacy of which had been questioned by the British Crown for several years.
In the late 1760s and early 1770s, Euro-American settlers began pouring into what is now northeastern Tennessee and southwestern Virginia, causing considerable agitation among the Overhill Cherokees and other tribes who controlled the area.
A young Cherokee chief, Dragging Canoe, who had been opposed to the sale of tribal lands, called for the violent removal of all European settlers west of the mountains.
The signing of the Watauga Petition and its acceptance by North Carolina —annexing the Washington District to that colony —added further impetus to the Cherokee, who were also being encouraged by the British, to push the American frontiersmen out of the Overmountain settlements.
[3] The Overmountain Men took part (to varying degrees) in numerous operations against British Loyalists and the British-aligned Cherokee and Shawnee all along the Appalachian frontier.
[3] During the summer of 1780, a group of Overmountain Men led by Isaac Shelby joined up with Colonel Charles McDowell to raid Loyalist outposts in the Piedmont mountain region of northwestern South Carolina.
[4]: 84–89 [5] After winning a decisive victory at the Battle of Camden in August 1780, British General Charles Cornwallis invaded North Carolina, and sent Major Patrick Ferguson into the mountains to root out the Patriot irregulars and protect the region's loyalists.
"[6] Upon receiving the message, Shelby rode 40 miles (64 km) to Watauga to consult with John Sevier, and the two agreed to raise armies and cross the mountains to engage Ferguson.
Lead had been mined at nearby Bumpass Cove for ammunition, Sullivan County merchant John Adair volunteered funds for the expedition, and women prepared clothing and food for the long march.
On September 26, after a fiery sermon by Reverend Samuel Doak, the Overmountain Men began their long trek over the Blue Ridge, marching from Sycamore Shoals to Shelving Rock at the base of Roan Mountain, where they camped for the night.
The force reunited the following day and spent the night at the McDowell family plantation at Quaker Meadows (modern Morganton, North Carolina), where they were joined by a 300-man contingent under Benjamin Cleveland and Joseph Winston.
Around 3 P.M., after several minutes of minor skirmishing, William Campbell told his men to "shout like hell and fight like devils,"[4]: 85–88 and two companies simultaneously opened fire on the loyalist positions.
The loyalist prisoners were marched toward the mountains, pausing in northern Rutherford County, where several were put on trial for atrocities allegedly committed on the frontier, and nine were hanged, including Colonel Ambrose Mills.
[15] Most of the Overmountain Men returned to the Washington District, where in subsequent months John Sevier, Joseph Hardin and Arthur Campbell (brother of William) led an expedition against the Cherokee to further secure the frontier.
In 1980, Congress appropriated funds for the establishment of the Overmountain Victory National Historic Trail, which follows the original marching route of the Overmountain Men between the mustering grounds at Sycamore Shoals State Historic Park and battle site at Kings Mountain National Military Park, and includes several branch trails in Virginia and North Carolina.