Sailing south with the royal army that besieged and captured Charleston, Tarleton and his Legion acted as a mobile screen, protecting the British rear against attacks by American cavalry and militia from the interior of the State. The young officer soon demonstrated a terrifying ability to strike suddenly and ferociously when the Americans least expected him. On May 6, 1780, at Lenuds Ferry, he surprised and virtually destroyed the American cavalry, forcing William Washington and many other officers and men to leap into the Santee River to escape him. After Charleston surrendered, there was only one unit of regular American troops left in South Carolina, the 3d Virginia Continentals commanded by Col. Abraham Buford. He was ordered to retreat to North Carolina. Cornwallis sent Tarleton and his Legion in pursuit. Covering 105 miles in 54 hours, Tarleton caught up with the Americans at Waxhaws. The 380 Virginians were largely recruits, few of whom had seen action before. Tarleton and the Legion charged from front, flank, and rear. Buford foolishly ordered his men to hold their fire until the saber-swinging dragoons were on top of them. The American line was torn to fragments. Buford wheeled his horse and fled. Tarleton reportedly sabered an American officer as he tried to raise a white flag. Other Americans screamed for quarter, but some kept firing. A bullet killed Tarleton’s horse and he crashed to the ground. This, he later claimed, aroused his men to a “vindictive asperity.” They thought their leader had been killed. Dozens of Americans were bayonetted or sabered after they had thrown down their guns and surrendered. [Illustration: The contemporary map shows the patriot defenses north of the city, the British siege lines, and warships of the Royal Navy that controlled the harbor waters.] One hundred and thirteen Americans were killed and 203 captured at Waxhaws. Of the captured, 150 were so badly wounded they were left on the battlefield. Throughout the Carolinas, the word of the massacre—which is what Americans called Waxhaws—passed from settlement to settlement. It did not inspire much trust in British benevolence among those who were being urged to surrender. [Illustration: Tarleton’s slaughter of Col. Abraham Buford’s command at the Waxhaws gave the patriots a rallying cry—“Tarleton’s quarter”—remembered to this day.]