Fort Dayton was built in 1776, in Herkimer County, New York. The fortification was constructed on the site of a preexisting blockhouse called Old Fort Herkimer, which was built during the Seven Years’ War decades prior. The fort was situated on the nort…
https://museum.dmna.ny.gov/forts/dayton
Built on Rockaway Peninsula, in Brooklyn, New York, Decatur Blockhouse was constructed in 1814 during the War of 1812 to guard Jamaica Bay. The blockhouse was built for the purpose of defending Jamaica Bay. Sixty to one hundred troops were stationed at …
https://museum.dmna.ny.gov/forts/decatur
Fort Martinus Decker was constructed in Port Jervis, in Orange County, New York. The fortified farmhouse stood near the Delaware River and is named for Lieutenant Martinus Decker. The fort was burned down during the Revolutionary War in a 1779 raid led …
https://museum.dmna.ny.gov/forts/decker
Decker's Ferry Fort, 1779, Staten Island, Port Richmond. The British used the burned stone house of a Tory named Decker to create a fort January 1779. Described as a stone house fortified with loopholes and abatis. Located opposite Bayone Neck facing toda…
https://museum.dmna.ny.gov/forts/deckers-ferry
(1): Built in 1776 Brooklyn, Fort Defiance was constructed to safeguard Buttermilk Channel. The fortress was armed with fifteen cannons. It saw action during the Battle of Long Island (also known as the Battle of Brooklyn) and was occupied in April of 1…
https://museum.dmna.ny.gov/forts/defiance
Mount Defiance, 1777, Essex County, Ticonderoga. Occupied by General Burgoyne with cannons from nearby Mount Hope Fort. This position forced the Americans at Fort Ticonderoga to abandon the fort in July 1777.
https://museum.dmna.ny.gov/forts/mount-defiance
Fort Delaware, 1760, Pennsylvania. On the Delaware River, also called Lower Fort (2), across from Fort Cochecton, Sullivan Co., NY. This is not a NYS Fort but is listed as it was teamed with one in NY.
https://museum.dmna.ny.gov/forts/delaware
Fort De Nonville was named for the seventeenth century Governor General of New France, Jacques-René de Brisay de Denonville. Built on the site of what was once Fort Conti, at the mouth of the Niagara River, near Rochester, New York, the fort consisted of…
https://museum.dmna.ny.gov/forts/denonville
Denyse's Heights Blockhouse, 1814-1815, Kings County, Brooklyn. Identified as west end of Long Island, the heights above Denyse Wharf (opposite Fort Lafayette) and Denyse Ferry is now encompassed by Fort Hamilton. One of several blockhouses for the defens…
https://museum.dmna.ny.gov/forts/denyses-heights
