During the American Revolutionary War, the fort was captured by Seth Warner and his Green Mountain Boys militia on May 12, 1775, but was re-taken by the British invasion under General John Burgoyne early in the summer of 1777.
Once at the front line of the New World clash between two colonizing European nations, the two forts' ruins remain and are operated as a historic attraction by the State of New York.
When complete, Fort Saint-Frédéric walls were twelve feet thick and four stories high, with cannons on each level.
It was manned by hundreds of officers and troops, principally from Les Compagnies Franches de la Marine.
Amherst used the construction of the fort as a means of keeping his men working through the winter of 1759 after pushing the French into modern Canada.
A massive, accidental fire in April 1773 entirely destroyed the log and earth fortress, leaving the empty stone ruins of two barracks buildings standing.