The King's (Carolina) Rangers was one of the most active Provincial Corps to serve during the American Revolution. The corps was originally raised in June of 1776 as the East Florida Rangers and commanded by Lt. Col. Thomas Brown. The East Florida Rangers was not a Provincial unit, but rather a corps raised and paid for by the government of East Florida. As such they took part in innumerable skirmishes in Georgia and in the defense of East Florida. They took part in the invasion of Georgia in 1779 and were reorganized as a Provincial regiment, renamed the King's (Carolina) Rangers, still under the command of Lt. Col. Brown. They were very active in Georgia and South Carolina throughout 1779 and took part in the defense of the city of Savannah during the French and American siege later that year.

In 1780 the corps was moved to Augusta, Georgia and in September of that month was besieged by a Rebel army under Colonel Clark. The siege was soon lifted and the corps remained there until besieged again in May of 1781 by Rebels under Lt. Col. Henry Lee. This time, after a gallant defense, the post fell and the regiment surrendered on 5 June 1781. Over the summer there was a general exchange of prisoners, so the regiment mostly returned to active duty. They took an active part again in many of the skirmishes throughout Georgia in 1781 and 1782. On 24 February 1782 the Georgia Loyalists were merged with the KCR, making one, stronger corps. With the evacuation of Savannah in July of 1782, the KCR embarked for Charlestown, SC, where they remained until October, 1782. Then, with the Royal North Carolina Regiment and the South Carolina Royalists, they embarked for St. Augustine to garrison East Florida. After spending most of 1783 in garrison there, they sailed for Nova Scotia where the regiment was disbanded. The majority of the men settled on the regimental land grant at Country Harbour.