On May 29, at Rugeley's Mill, Tarleton learned that Buford's force was now only 20 miles ahead. Tarleton sent a messenger ahead requesting that Buford surrender. In the message, Tarleton exaggerated his forces in hopes of scaring Buford into surrendering, or at least delaying him. After delaying the messenger, while his infantry reached a favorable position, Buford declined by replying: "Sir, I reject your proposals, and shall defend myself to the last extremity."
At 3:00 P.M., Tarleton caught up with Buford near the Waxhaws District on the border of North Carolina and South Carolina. Waxhaws is 185 miles north of Charleston and 6 miles south of the North Carolina border.
Tarleton's advance guard slashed through Buford's rear guard. Buford aligned his infantry and cavalry into a single line of defense with a small reserve posted in the rear. Tarleton divided his command into three detachments. On the right flank was 60 dragoons and 50 light infantry. On the left flank was Tarleton himself with another 30 dragoons and additional infantry. In the center were the rest of the 17th Dragoons and infantry. Tarleton's disposition was flexible enough to attack the center and both flanks of the Patriot force simultaneously.
Tarleton formed up his troops on a low hill opposite the Patriot line. At 300 yards, his cavalry began their charge. When Tarleton's cavalry was 50 yards from Buford's line, the Patriots presented their muskets, but they were ordered to hold their fire until the British were closer. Finally, with the British only 10 yards away, Buford's men opened fire. Tarleton's horse was killed under him, but the forward momentum of the British charge was able to carry them into the Patriot lines. Patriot line was broken and in some cases, ridden down. The rout quickly began.
Tarleton claimed that his horse was shot out from under him and he was pinned. His men, thinking that their commander had been shot and killed under a flag of truce, angrily attacked again. They slashed at anyone and everyone, including men who were kneeling with their hands up in surrender.
The Patriots claimed that Tarleton himself ordered the renewed attack because he didn't want to bother with taking prisoners. Based on his aggressive style and zeal for brutal charges in other engagements, the Patriot claims are usually given more credence. The first complete statement claiming that a massacre occurred did not appear until 1821 in a letter from Dr. Robert Brownfield to William Dobein James.
The battle lasted for about 15 minutes with Buford managing to escape. It took only days for Tarleton to be branded with the reputation. He became known as "Bloody Ban", "Ban the Butcher", or "Ban the Butcher." For the remainder of the war in the South, "Tarleton's Quarter" meant to show no mercy. "Buford's Massacre" became a rallying cry for the Patriots.
The battle has always been controversial, since after breaking Buford's line Tarleton's men slaughtered many of the Virginians who surrendered, hacking them down with their sabres. Some sources, such as Buford's Adjutant Henry Bowyer and Surgeon's Mate Robert Brownfield, claim that Buford belatedly raised a white flag but was ignored by Tarleton. In Tarleton's own account, he virtually admits the massacre, stating that his horse had been shot from under him during the initial charge and his men, thinking him dead, engaged in "a vindictive asperity not easily restrained."
The wounded of both parties were treated with equal humanity by the British. The American officers and soldiers who were unable to travel, were paroled the next morning, and placed at the neighboring plantations and in a meeting house, not far from the field of battle. Surgeons were sent for from Camden and Charlotte town to assist them. Every possible convenience was provided by the British.
Before the massacre, popular opinion held that the Southern states were lost to the Patriot cause and would remain loyal to Britain. The reports of the Waxhaw Massacre, however, may have changed the direction of the war in the South. Many who might have stayed neutral flocked to the Patriots, and "Tarleton's Quarter!" and "Remember Buford" became rallying cries for the Whigs. The massacre was also directly responsible for the over-mountain men (from what is now Tennessee) forming a volunteer force that utterly destroyed Major Patrick Ferguson's command at Kings Mountain, South Carolina.