Fort William and Mary
New Castle, Rockingham County, New Hampshire
Marker Inscription
In commemoration of the first victory of the American Revolution the capture on this site of Fort William and Mary 14-15 December 1774. In Admiration of the gallantry of Capt. John Langdon and Maj. John Sullivan Leaders of the assaults.
The Story
In December 1774, months before Lexington and Concord, New Hampshire patriots learned the Crown had banned gunpowder imports and moved to seize the royal magazine at New Castle. Over two days, local militia led by John Langdon and John Sullivan overwhelmed the small garrison at Fort William and Mary and carried off gunpowder, muskets, and cannon. The captured powder is traditionally said to have supplied later fighting.
Why it matters
Often called one of the first overt acts of armed resistance against British authority, the raid shows the Revolution stirring in the colonies before the war's official opening shots.
The story behind this marker
AI contextThe era
In late 1774, the American colonies were simmering. The previous year's protests over British policy had hardened into a tense standoff, and the Crown was trying to keep military supplies — especially gunpowder — out of colonial hands. Word that the King had moved to block powder imports landed like a spark in dry grass.
In New Hampshire, that news pointed straight at a royal fort guarding the entrance to Portsmouth Harbor at New Castle. Inside sat a store of gunpowder and arms, defended by only a small garrison. To colonists worried that the Crown might soon disarm them, it was both a threat and an opportunity.
All of this was happening months before the war officially began. There was no Continental Army, no declared independence — only growing anger, local militia, and a fort that suddenly looked like the place where words might turn into action.
People & events
Over two days in December 1774, New Hampshire men moved on the fort. According to this marker, the assaults were led by Captain John Langdon and Major John Sullivan, and it praises their gallantry in the capture.
The small royal garrison could not hold against a determined crowd of colonists. The attackers overwhelmed the defenders and carried off the fort's stores — the gunpowder, and by tradition muskets and cannon as well — spiriting the supplies away into the countryside.
Both leaders named here went on to play significant roles in the founding era, but on these December days they were simply local men willing to lay hands on royal property. That captured powder is traditionally said to have found its way into later fighting, turning a raid on a harbor fort into a contribution to the coming war.
Its place in the American story
This marker makes a bold claim — that the seizure of Fort William and Mary was the first victory of the American Revolution. Whether or not one accepts that exact ranking, the raid is widely remembered as one of the earliest overt acts of armed defiance against British authority in the colonies.
What makes it striking is the timing. This happened before the famous shots at Lexington and Concord, at a moment when open rebellion was still a line most colonists had not crossed. Here, ordinary New Englanders crossed it — seizing a royal fort and its arms rather than merely protesting.
That is why the site matters to the national story. It shows the Revolution stirring from the ground up, in local militia and local leaders, before it had a name, an army, or a Declaration to justify it.
If you visit
You're standing at the mouth of Portsmouth Harbor, and the setting does a lot of the storytelling. Look out at the water and the harbor approaches the fort was built to guard, and picture why a store of powder here was worth the risk of open defiance.
Let the early date sink in. Everything you may already know about 1775 and 1776 came after this. Visiting here is a chance to feel the Revolution in its restless, unofficial beginnings, when the outcome was anything but certain.
The coastal New Castle location makes this an easy and atmospheric stop on a seacoast New Hampshire route. Take in the memorial, the harbor air, and the sense that you're at one of the places where resistance turned into action before the war had truly begun.
Written by AI to add context, grounded in the marker’s inscription and the historical record. The inscription above is the original, unaltered text.
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Related people
- · John Langdon
- · John Sullivan
Related events
- · Raid on Fort William and Mary
Themes & tags
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