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. 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. Many Overmountain Men, including John Sevier, John Rhea, and Isaac Shelby, went on to play prominent roles in the establishment of the states of Tennessee and Kentucky. The foothold they gained on the frontier helped open the door to mass westward migration in ensuing decades. The Overmountain settlements 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. The Treaty of Lochaber, signed in 1770 between the British and the Cherokee, moved the boundary of British territory south to Long Island of the Holston (modern Kingsport, Tennessee). While this brought settlements north of the Holston under British protection, the settlers south of the river were ordered to leave. Rather than comply with the Crown's order, the illegal settlers —mostly concentrated at the Watauga settlement at Sycamore Shoals (in present-day Elizabethton), the Nolichucky settlement (near modern Greeneville), and Carter's Valley (near modern Kingsport) —decided to lease their land from the Cherokee, and in 1772 established the Watauga Association, which was the first independent American constitutional government west of the Appalachians. In 1775, the Watauga and Nolichucky settlers purchased their leased lands outright and formed the independent Washington District. They almost immediately petitioned Virginia for annexation, which was denied. The Crown and the colonial governments (especially Virginia) considered the land purchases illegal, and ordered the settlers to leave what they considered to be Cherokee lands. Also, some