On the morning of June 28, 1776, nine British warships carrying nearly three hundred cannons sailed toward a half-built fort on a sandy island off the coast of Charleston, South Carolina. Inside that fort stood William Moultrie, a forty-six-year-old plantation owner with thirty-one guns, enough gunpowder for roughly twenty-eight rounds per cannon, and a garrison of men who had never fought a naval battle. His own commanding officer had called the fort a slaughter pen and wanted to abandon it entirely. By the end of that day, the largest navy on earth would limp away in the dark, its flagship shattered, its admiral wounded and missing his pants, and one of its finest warships burning at the waterline.
The man responsible was a rice farmer who had built his fort out of trees. Moultrie was born in Charleston in 1730, the son of a prominent Scottish immigrant physician. By the age of nineteen, he had married into a family that owned an 8,800-acre plantation. English law gave him control of his wife’s family property, and he soon added a thousand acres of his own, making him wealthy and well-connected.
But Moultrie refused to sit idle. He was elected to the South Carolina Commons House of Assembly in 1752. When the Cherokee War erupted in 1758, he volunteered and served as a captain in the South Carolina militia. The frontier fighting taught him how to command men in difficult terrain, improvise with limited resources, and stay calm when everything around him fell apart.
Those skills would matter more than any European military textbook. By 1774 he held the rank of colonel. When the American Revolution heated up in 1775, Moultrie was named colonel of the 2nd South Carolina Regiment. He designed a flag for his troops, a simple dark blue banner with a white crescent.
He noted later that it was the first American flag displayed in South Carolina during the Revolution. He had no way of knowing it then, but that flag would one day become the state flag of South Carolina. Across the Atlantic, the British were planning to crush the rebellion. After being pushed out of Boston in March 1776, they looked south.
Royal governors insisted the South was full of loyalists waiting for the king’s army. Major General Henry Clinton sailed from Boston in January with orders to link up with a force under Lord Cornwallis, escorted by a naval squadron under Commodore Peter Parker. Together they would secure the southern colonies, then swing north to help take New York. The plan immediately collapsed.
Storms battered Cornwallis’s fleet, and the loyalist uprising the British expected had already been crushed at the Battle of Moore’s Creek Bridge in February. Clinton and Parker sat off the North Carolina coast with a massive force and nowhere to use it. They turned their attention to Charleston, one of the largest and wealthiest port cities in North America. British scouts surveyed the harbor and found an unfinished fort on Sullivan’s Island, a four-mile-long strip of sand at the entrance to the harbor.
Parker was confident his warships could blast it to pieces in a few hours. What Parker did not know was that the man inside that fort had no intention of leaving. Moultrie and his regiment had arrived on Sullivan’s Island in March 1776 with orders to build a fortification strong enough to hold a thousand men. Laborers and soldiers hacked a clearing out of a wilderness of swamp, live oak, myrtle, and palmetto trees.
They built two parallel walls of palmetto logs, each about twenty feet high with a sixteen-foot gap packed tight with sand. Palmetto wood is soft, fibrous, and spongy. A cannonball that would shatter oak simply buried itself in palmetto like a fist punching a pillow. By the time the British fleet appeared at the end of May, only the seaward wall was complete.
The sides facing away from the ocean were still under construction. The back of the fort was essentially open. In early June, General Charles Lee arrived to take overall command. Lee was one of the Continental Army’s most experienced officers, a former British soldier.
He took one look at the fort and called it a slaughter pen. If British ships got around to the side or the back, they would massacre every man inside. Lee wanted Moultrie to abandon Sullivan’s Island entirely. Moultrie refused, insisting the palmetto walls would hold.
Lee went over Moultrie’s head to John Rutledge, the president of the South Carolina General Assembly, demanding a direct order to evacuate. Rutledge sided with Moultrie. The fort would be defended. Lee ordered an escape bridge of empty barrels built across the cove, just in case, and warned Moultrie that when the ships came alongside, they would knock the fort down in half an hour.
Moultrie simply stayed. By mid-June, Clinton had landed about 2,000 troops on Long Island, a few hundred yards from the northern tip of Sullivan’s Island. The plan was a two-pronged attack. Parker’s warships would bombard the fort from the sea while Clinton’s soldiers crossed the shallow channel at Breach Inlet and assaulted the vulnerable rear.
British intelligence said the water there was only eighteen inches deep, easy to wade. The actual depth was seven feet. On the morning of June 28, Moultrie woke to see the British fleet unfurling its sails. Nine warships, led by the 50-gun flagship HMS Bristol and the 50-gun Experiment, with the Actaeon, Solebay, Active, Siren, Sphinx, Friendship, and bomb vessel Thunder behind them, pointed nearly three hundred heavy cannons at his half-finished fort.
Moultrie had thirty-one guns and a garrison of about four hundred men, most trained as infantry, not artillery. Every cannon had roughly twenty-eight rounds. After that, they were done. Moultrie gave one of the most important tactical orders of the battle.
His men were to fire slowly, one round every ten minutes, and aim only at the ships closest to the fort. Every shot had to count. While most commanders would have ordered their men to throw everything at the approaching fleet, Moultrie told his soldiers to wait, breathe, and make every shot count. Around 10:30 in the morning, the British opened fire.
The bomb vessel Thunder lobbed thirteen-inch mortar shells. Then Bristol, Experiment, Active, and Solebay moved into position about four hundred yards offshore and let loose full broadsides. Thousands of pounds of iron screamed toward the island. The cannonballs hit the palmetto walls and stopped.
The soft, spongy wood absorbed the impact, and the sand between the walls absorbed the shock. The British were pouring fire into a fort that was eating their ammunition. Moultrie’s gunners fired slowly and carefully, with devastating accuracy. A British engineer later admitted the American fire was surprisingly well served, slow but decisive.
Moultrie ordered his men to concentrate on Bristol and Experiment. The results were catastrophic for the British. Bristol took seventy direct hits to her hull. Chain shot destroyed her rigging and damaged her masts.
Twice, American fire cleared the entire quarterdeck. Every officer around Parker was killed or wounded. Captain John Morris had his right arm blown off and died days later. Lord William Campbell, the deposed royal governor, was wounded by a splinter that would slowly kill him over two years.
A flying splinter ripped the seat of Parker’s pants clean off, leaving the commodore standing on his quarterdeck with his backside exposed. Another splinter pierced his knee. The image of Parker hobbling around his shattered flagship without his pants became one of the Royal Navy’s great humiliations, and American newspapers loved it. On the Experiment, Captain Alexander Scott lost an arm.
Twenty-three of his crew were killed and another fifty-five wounded. Across the fleet, the British suffered over two hundred killed and wounded. Three frigates, the Actaeon, Siren, and Sphinx, were sent to hit the fort from behind, but their unenthusiastic pilots ran them aground on a submerged shoal. The Siren and Sphinx pulled free.
The Actaeon was stuck fast. By morning, her captain set her on fire to keep her from falling into American hands. Before the flames consumed her, Americans rowed out, boarded the burning ship, and seized her bell and colors. Clinton’s land assault never got off the ground.
His men discovered Breach Inlet was seven feet deep with a vicious current. Colonel William Thompson’s riflemen and artillery opened fire from the Sullivan’s Island side, and the casualties were horrendous. Clinton called off the attack. By mid-afternoon, a false report reached Moultrie that Clinton had landed troops between his position and Thompson’s outpost.
Fearing an attack from the rear, Moultrie silenced his cannons and reserved all remaining powder. For ninety minutes, the American guns went quiet while British shot pounded the palmetto walls. The report proved false, and the gunners went back to work. During the lull, a British cannonball snapped the fort’s flagpole in half, sending Moultrie’s blue crescent flag tumbling onto the beach.
A flag coming down could mean surrender. Sergeant William Jasper climbed through a gun opening, dropped onto the open beach under full bombardment, picked up the flag, lashed it to a gunner’s sponge staff, and planted it on the rampart for everyone to see. He was not hit. He survived the battle and became a hero across the colonies.
As evening fell, General Lee visited the fort. The man who had called it a slaughter pen days earlier looked at the intact walls and the flag still waving and told Moultrie that he was doing very well there. By nine o’clock that night, Parker had had enough. Forty men were dead aboard Bristol alone, with seventy-one wounded.
The Experiment was nearly as battered. The Actaeon was being torched. The land assault had never materialized. After nearly twelve hours of continuous bombardment, Parker signaled the withdrawal.
By 11:30 that night, the British fleet limped back to Five Fathom Hole. The British had fired roughly 7,000 cannonballs and burned more than twelve tons of gunpowder. They lost over two hundred men killed and wounded, plus an entire warship. American casualties were seventeen killed and between twenty and twenty-six wounded.
Moultrie’s men had expended about 960 shots, less than one-seventh of the British expenditure, and had wrecked the attacking fleet. The victory sent a shock through the colonies. The Declaration of Independence had not yet been signed. Americans were not sure the rebellion could succeed.
Then a colonial militia colonel with a handful of cannons had beaten the most feared navy on earth with a fort made of trees. If that was possible, maybe independence was not a fantasy. In London, the defeat was a scandal. Satirical poems mocked Parker by name, and the British press had a field day with the image of a commodore who had lost his trousers to a colonial militia.
The South Carolina General Assembly renamed the fort Fort Moultrie. The Continental Congress passed a resolution thanking Moultrie personally, and in September 1776 he was promoted to brigadier general. Charles Lee wrote to George Washington that Moultrie deserved the highest honors. Clinton’s troops sat on Long Island for three more weeks, then sailed north to join the campaign in New York.
They would not return to South Carolina for four years. When the British came back in 1780, they had learned from their mistakes. They bypassed Fort Moultrie, laid siege to Charleston from the landward side, and forced the entire American garrison, including Moultrie, to surrender. Moultrie was taken prisoner and held at Hadrell’s Point and later at a plantation called Snee Farm.
He became the senior Continental officer among the prisoners and advocated for his fellow captives. When the British attempted to convince him to switch sides, promising freedom and the return of his confiscated property, he refused, saying he would hate himself and shun mankind if he were guilty of such baseness. He stayed a prisoner until exchanged in 1782 and was promoted to major general, the last man Congress appointed to that rank during the war. After independence, Moultrie returned to politics.
He was elected governor of South Carolina in 1785 and served again from 1792 to 1794. In 1802 he published his Memoirs of the Revolution, a two-volume account that remains one of the best primary sources on the war in the southern colonies. He died in Charleston on September 27, 1805, at the age of seventy-four. The blue crescent flag he designed still flies today.
South Carolina added a palmetto tree to the center in honor of the logs that saved the fort, and that flag has been the state’s official banner ever since. Fort Moultrie remained an active military post for nearly two centuries, through World War II. It sits on the southern tip of Sullivan’s Island, a quiet patch of sand and concrete that looks nothing like the desperate scene of June 1776. But the palmetto trees are still there.
On the worst day the British Navy had in 1776, a tree is what beat them.