Fort William and Mary was the site of one of the first acts of the American Revolution. On the afternoon of December 14, 1774, colonists arrived aboard gundalows (sailing barges) and raided the fort. Severely outnumbered, Captain John Cochran and the fort's five soldiers surrendered, whereupon the rebels loaded onto a boat 100 barrels of gunpowder. The boat was floated up the Piscataqua River and the powder offloaded for transport to inland towns, including Durham, where the ammunition was stored in the cellar of the Congregational church. The next day, the colonists returned to the fort and removed 16 of the lighter cannon and all small arms. The gunpowder was used at the 1775 Battle of Bunker Hill.