One source claims this happened on March 8th.

During the Revolutionary War, British troops occupied the plantation of Isaac McPherson (described as “a great Rebel, a man of property” in contemporary reports) in March, 1780, after unsuccessfully trying to chase down fifty Patriot troops on horseback. During their stay, the British engaged in what they thought was a skirmish with the enemy, but mistakenly attacked their own troops. These friendly forces were under Maj. Charles Cochrane and the American Volunteers with Maj. Patrick Ferguson, who was wounded