The resulting conflict led to Dunmore's War (1774). A series of forts controlled by Daniel Boone began to be built in the valley of the Clinch River during this time. By the Treaty of Camp Charlotte concluding this conflict, the Shawnee and Mingo relinquished their claim south of the Ohio. The Cherokee sold Richard Henderson a portion of their land encompassing extreme southwest Virginia in 1775 as part of the Transylvania purchase. This sale was not recognized by the royal colonial government, nor by the Chickamauga Cherokee war chief Dragging Canoe. But, contributing to the Revolution, settlers soon began entering Kentucky by rafting down the Ohio River in defiance of the Crown. In 1776, the Shawnee joined Dragging Canoe's Cherokee faction in declaring war on the "Long Knives" (Virginians). The chief led his Cherokee in a raid on Black's Fort on the Holston River (now Abingdon, Virginia) on July 22, 1776 (see Cherokee–American wars (1776–94)). Another Chickamauga leader, Bob Benge, also continued to lead raids in the westernmost counties of Virginia during these wars, until he was slain in 1794.