Fort Tompkins (1814) (Plattsburgh, New York)

Plattsburgh · New York · War of 1812

Quick BriefFort Tompkins was a small earthwork fortification built in 1814–1815 at Plattsburgh, New York, housing three cannons and positioned southwest of Fort Brown. Constructed after the September 1814 Battle of Plattsburgh, it formed the southwestern anchor of a pentagon-shaped defensive complex that protected the strategic Lake Champlain corridor during the War of 1812.

History & Significance

Fort Tompkins was a supporting work in the extensive defensive line built to safeguard Plattsburgh and its crucial military supplies during the War of 1812. General Alexander Macomb established the initial fortifications—Forts Brown, Moreau, and Scott—in the summer of 1814 before the pivotal Battle of Plattsburgh (September 11, 1814).

After the British naval defeat on Lake Champlain and the American land victory, two additional forts were constructed to strengthen the perimeter: Fort Tompkins to the southwest of Brown, and Fort Gaines between Tompkins and the water. These five forts, connected by curtain walls, formed a pentagon-shaped complex that became the core of Plattsburgh Barracks.

The fort's modest three-gun battery symbolized the resourcefulness of American defenders who, despite being vastly outnumbered, repelled a British invasion force of over 10,000 men. The British retreat from Plattsburgh proved decisive for American peace negotiations at Ghent, denying Britain leverage to demand territorial concessions and hastening the treaty that ended the war.