The Battle of Monck's Corner was fought on April 14, 1780, outside of Charleston, South Carolina, which was under siege by British forces under the command of General Sir Henry Clinton in the American Revolutionary War. The British Legion, under the command of Lieutenant Colonel Banastre Tarleton, surprised a Patriot force stationed at Monck's Corner and drove them away. The action cut off an avenue of escape for Benjamin Lincoln's besieged army. Aside from the British Legion, and the 33rd Foot and 64th Foot led by Lieutenant Colonel James Webster, the force included the American Volunteers led by Major Patrick Ferguson. In March, Tarleton and Ferguson, with their cavalry, joined Clinton and the main British force in its thirty-mile approach to Charles Town. By April 2, the third British attempt to capture Charleston was officially underway. To guard the upper reaches of the Cooper River, on April 12, Southern Department Commandant Lincoln sent Brigadier General Isaac Huger and all of the Patriot cavalry to guard Biggin Bridge, near Monck’s Corner, South Carolina. This detachment consisted of the 1st and 3rd Continental Dragoons, the remains of Pulaski’s Legion cavalry, Colonel Daniel Horry’s South Carolina Dragoons, and North Carolina militia.

On April 13, from 10:00 PM, a swift silent march was undertaken along the road to Monck's Corner by Tarleton and his men. They encountered no American scouts or patrols. When they reached Monck's Corner, they caught the Americans completely by surprise. Not only had there been no patrols, but Gen. Huger had placed his cavalry in front of his infantry. Tarleton, typical of his tactics, led a cavalry charge directly into the Americans; swamps on either side of the causeway leading to the bridgehead precluded a flank attack. The British easily dispersed the militia defending Biggin Bridge. Most of the Americans were able to escape, including Huger and Lieutenant Colonel William Washington; however, Tarleton was able to capture wagons of supplies and a great many excellent cavalry horses of great value to the British as they had lost most of their horses on the voyage to the south. Ferguson was offended by these acts, and Webster had the perpetrators sent back to the British camp outside Charleston, where they were supposedly "tried and whipped." The American defeat at Monck's Corner left Lincoln without any lines of communication from Charleston to the interior of South Carolina or with allies by sea. The defeat only hastened the surrender of Charleston.