First Raid on Fort William and Mary

# The First Raid on Fort William and Mary

By the autumn of 1774, the relationship between Britain's American colonies and the Crown had deteriorated to a dangerous breaking point. The passage of the Coercive Acts — known to the colonists as the Intolerable Acts — earlier that year had inflamed tensions throughout New England. Boston's port had been forcibly closed, Massachusetts's charter had been effectively revoked, and British authorities were tightening their grip on colonial self-governance. In September, the First Continental Congress convened in Philadelphia to coordinate a unified response, and throughout the colonies, patriots began organizing committees of correspondence and militia companies. It was against this volatile backdrop that word reached New Hampshire of a royal order prohibiting the export of military stores to the colonies, a directive that many interpreted as a prelude to disarmament and, potentially, armed suppression. The news would ignite one of the most daring and consequential acts of colonial defiance — one that predated the famous battles of Lexington and Concord by four full months.

Fort William and Mary sat on New Castle Island at the mouth of Portsmouth Harbor, guarding the approaches to one of New Hampshire's most important seaports. Despite its strategic position, the fort was woefully undermanned, garrisoned by a mere captain and five soldiers under British command. The fort's stores, however, were significant: approximately one hundred barrels of gunpowder along with other military supplies were housed within its walls. When Paul Revere rode north from Boston on December 13, 1774, carrying intelligence that British reinforcements might soon be dispatched to secure the fort and its contents, New Hampshire's patriot leaders recognized that they faced a narrow window of opportunity.

John Sullivan, a prominent lawyer and militia leader from Durham who would later become one of the Continental Army's most important generals, quickly assumed a central role in organizing the response. On December 14, 1774, Sullivan helped rally approximately four hundred men from the surrounding communities and led them in a bold march on the fort. The sheer size of the force made the outcome almost inevitable. The small British garrison, vastly outnumbered and facing an overwhelming show of colonial resolve, offered only token resistance before surrendering. No lives were lost in the confrontation, but the symbolic and practical consequences were enormous. The raiders seized roughly one hundred barrels of gunpowder and carried them away from the fort, distributing the precious stores to communities throughout New Hampshire, where they would be hidden and safeguarded for future use.

The significance of this event cannot be overstated. The raid on Fort William and Mary represented the first organized seizure of British military property by American colonists in the escalating crisis that would become the Revolutionary War. While acts of protest such as the Boston Tea Party had targeted commercial goods, this was a direct assault on a military installation — a clear act of rebellion against the authority of the Crown and an unmistakable signal that at least some colonists were prepared to use force to resist British power. The gunpowder seized that day did not sit idle; historians believe that some of it was later used by patriot forces at the Battle of Bunker Hill in June 1775, meaning the raid had tangible military consequences beyond its immediate symbolic impact.

For John Sullivan, the raid marked the beginning of a distinguished revolutionary career. He would go on to serve as a delegate to the Continental Congress and was commissioned as a brigadier general in the Continental Army, participating in the Siege of Boston, the Battle of Trenton, and leading a major campaign against the Iroquois Confederacy in 1779.

The raid on Fort William and Mary also demonstrated something that would prove essential to the revolutionary cause: the capacity of ordinary colonists to organize quickly, act decisively, and cooperate across community lines in pursuit of a shared political objective. Months before the first shots were fired at Lexington and Concord, the men who stormed that small fort on New Castle Island showed that the spirit of armed resistance was already alive in America — and that the revolution, when it came, would not be an impulsive reaction but the culmination of deliberate, courageous action.