Fort Trumbull State Park

Fort Trumbull guarded the entrance to the Thames River and New London Harbor. On September 6, 1781, Benedict Arnold's British force bypassed it with minimal resistance while the main garrison crossed to defend Fort Griswold in Groton. The current masonry fort dates to 1839, but the earthwork foundations of the 1778 Revolutionary-era fort lie beneath. The site preserves the strategic geography that made New London a significant privateering port.