The Battle of Groton Heights occurred on September 6, 1781, as part of a broader British raid on the Connecticut coast. Lieutenant General Sir Henry Clinton ordered Brigadier General Benedict Arnold to conduct this raid against the port of New London to divert General George Washington from marching against Lord Cornwallis's army in Virginia. The strategic objective was to weaken American military focus by forcing Washington to respond to threats against his own territory rather than pursuing British forces in the South.
The engagement involved a Connecticut militia force defending Fort Griswold, located in Groton across the Thames River from New London, led by Lieutenant Colonel William Ledyard against the British forces commanded by Brigadier General Benedict Arnold and Lieutenant Colonel Edmund Eyre. The Connecticut militia stubbornly resisted British attempts to capture the fort, demonstrating determined defensive action. The British eventually breached the fort's defenses, but as they entered, the Americans surrendered. Despite the surrender, the British continued firing and killed many of the American defenders. Simultaneously, the broader raid resulted in the burning of New London along with several ships, though many vessels managed to escape upriver to safety.
While the British succeeded in taking the fort and destroying portions of the port, the raid proved costly for the attackers. Several leaders of the attacking British force were killed or seriously wounded during the expedition. These high British casualties incurred during the overall raid against Groton and New London ultimately led to criticism of the operation. The engagement became notable not only for its military outcome but also for the controversial circumstances surrounding the killing of Americans after their surrender at Fort Griswold.
The American Revolutionary War (1775–1783) grew from colonial resistance to British taxation without parliamentary representation — a dispute that radicalized through the Stamp Act (1765), the Townshend Acts (1767), and the Boston Massacre (1770). Fighting began at Lexington and Concord in April 1775; the Continental Congress declared independence on July 4, 1776. The Continental Army under George Washington faced severe shortages of supplies and troops, enduring the brutal winter at Valley Forge (1777–1778) before French alliance and French financing turned the military balance. Major engagements included Bunker Hill (1775), Trenton (1776), Saratoga (1777) — which secured French intervention — and Yorktown (1781), where British General Cornwallis surrendered to Washington. An estimated 25,000 American soldiers died in service, from combat, disease, and captivity. The Treaty of Paris (1783) recognized American independence and ceded British territory east of the Mississippi, though it left unresolved questions about Indigenous land rights and the status of Loyalists.
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