6
Sep
1781
Battle of Fort Griswold
Groton, CT· day date
The Story
# The Battle of Fort Griswold
By the autumn of 1781, the American War of Independence was entering its decisive phase. In the south, General George Washington and his French allies were maneuvering toward what would become the siege of Yorktown, a campaign that would effectively end major combat operations in the war. Yet even as the British position grew increasingly precarious, the conflict continued to exact a devastating toll on communities throughout the colonies. One of the war's most tragic episodes unfolded on September 6, 1781, along the banks of the Thames River in southeastern Connecticut, when British forces launched a coordinated assault on the towns of New London and Groton. The attack was led by none other than Benedict Arnold, the former American general whose name had already become synonymous with treason. Arnold, a Connecticut native who had defected to the British the previous year, knew the region intimately, and the Crown exploited that knowledge by placing him in command of a force of approximately 1,700 troops tasked with destroying American privateering operations and the supplies stored along the river.
Arnold divided his forces into two columns. He personally led the assault on New London, on the western bank of the Thames, where his troops burned much of the town and destroyed warehouses filled with goods captured from British merchant ships. Meanwhile, approximately 800 British soldiers crossed the river to attack Fort Griswold, a stone-walled fortification perched atop Groton Heights on the eastern bank. The fort was garrisoned by roughly 150 local militia under the command of Colonel William Ledyard, a respected community leader who understood that his small force faced overwhelming odds but resolved to defend the position nonetheless. The terrain favored the defenders, and the stout walls of the fort provided meaningful protection, but the sheer disparity in numbers meant that the outcome, barring relief or retreat, was likely predetermined.
The British assault proved far costlier than the attackers had anticipated. The militia defenders fought with remarkable determination, repulsing two full-scale assaults and inflicting severe casualties on the advancing British columns. Among those killed during the fighting was Major William Montgomery, a British officer who fell while leading his men against the fort's walls. On the third attempt, however, the British finally breached the fortifications and poured inside. What followed has been remembered as one of the darkest moments of the Revolutionary War. Rather than accepting the surrender of the garrison, many of the British soldiers, enraged by the fierce resistance and the heavy losses they had sustained — approximately 200 killed and wounded — turned on the defenders even after organized resistance had ceased. Colonel Ledyard, recognizing the hopelessness of further combat, reportedly offered his sword to a British officer in the customary gesture of formal surrender. According to accounts that have persisted since that day, the officer took the sword and ran Ledyard through with it. The killing did not stop there. Approximately 85 American defenders were killed in the battle and the massacre that followed, and some 60 more were wounded, many of them gravely. The survivors were loaded onto a cart to be transported downhill, but the cart reportedly broke free and careened down the slope, compounding the suffering of the already broken men.
The events at Fort Griswold sent shockwaves through Connecticut and the broader American public. The massacre of soldiers who had already surrendered violated the accepted rules of warfare and fueled outrage that only strengthened colonial resolve. Benedict Arnold's role in directing the operation against his own home state deepened the contempt in which he was already held. For the communities of New London and Groton, the raid was a catastrophe — homes and livelihoods were destroyed, and nearly every family in the area lost someone in the fighting.
In the larger story of the Revolution, the Battle of Fort Griswold stands as a somber reminder that the war's final chapter was written not only in the grand maneuvers at Yorktown but also in the blood of ordinary citizens who took up arms to defend their homes. Just weeks after the massacre on Groton Heights, Cornwallis surrendered his army in Virginia, effectively ending the war. The men who died at Fort Griswold never saw that victory, but their sacrifice became a lasting symbol of the cost of American independence. Today, the Groton Monument, a granite obelisk erected on the site of the battle, bears the names of those who fell, ensuring that their story endures for future generations.
People Involved
Colonel William Ledyard
Militia Colonel
Commander of Fort Griswold who led the garrison's fierce defense against the British assault on September 6, 1781. After the fort was overwhelmed, Ledyard reportedly offered his sword in surrender and was stabbed with it by a British officer. His death became the central atrocity of the Fort Griswold massacre.
Major William Montgomery
British Officer
British officer who led the initial assault on Fort Griswold and was killed during the fighting. His death enraged the British troops, contributing to the violence that followed the fort's surrender. The killing of a senior officer during an assault often led to retaliatory violence in eighteenth-century warfare.