Knox's Headquarters State Historic Site, in the town of New Windsor in Orange County, New York, consists of the Georgian house of the Ellison family, built in 1754, and the grounds around it. It is located on Old Forge Hill Road, just south of Route 94 east of Vails Gate. Although most closely associated with Henry Knox, who was using it as his headquarters as the Revolutionary War drew to a close in the early 1780s, it was used as a general's headquarters throughout most of the war, by Nathanael Greene and Horatio Gates.