In order to make up for a shortage of bread in his supplies, Stewart had been sending out foraging parties each morning to dig up yams, unarmed except for a small guard detail. At around 8 a.m. on September 8, Captain John Coffin and a detachment of his South Carolina Loyalist cavalry were reconnoitring ahead of Stewart's main force when he encountered a mounted American scouting party under Major John Armstrong. Coffin pursued Armstrong, who led him into an ambush. Attacked by Henry Lee's 2nd Partisan Corps, Coffin escaped but left 4 or 5 of his men killed and 40 more captured. The Americans then came across Stewart's foragers and captured about 400 of them.