In April a patriot militia force led by
Micajah Williamson set up camp in close proximity to Augusta. Lt. Col. Brown, commanding a force of approximately 300 militiamen and 200 African Americans, refused to engage due to exaggerated reports of the patriot's strength. In May, Williamson was joined by
Elijah Clarke and
Henry 'Light Horse Harry' Lee, bringing with them additional troops. General
Andrew Pickens and 400 American troops managed to cut off relief forces sent to alleviate Fort Cornwallis at
Ninety Six, allowing for the
Siege of Augusta to begin. On May 23 nearby Fort Grierson fell, leaving the KCR and Lt. Col. Thomas Brown isolated, albeit well defended, in Fort Cornwallis. The besieging army only had one cannon and proved ineffective against the forts walls. To counter this, the patriots constructed a 30 feet (9.1 m) high wooden tower in order to allow their singular cannon to fire down into the fort. The KCR made several
sorties to prevent its construction however were repelled each time. On June 1 the tower was high enough to prove effective, knocking the KCR's guns off of their mounts and destroying the barracks. On June 4 the patriots assault Fort Cornwallis and demanded surrender. Lt. Co. Brown refused due to it being the
King's birthday. On June 5 Lt. Col. Brown negotiated a surrender and was taken prisoner alongside the rest of the KCR. Brown was then paroled, alongside most of his troops, by
Nathanael Green and escorted to Savannah on the agreement they would not re-enter the war. == 1782 ==