Dannemora Atlas F, Site #9, 1961-65, Clinton County, Dannemora. see Atlas F for detailed information.

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 north side of the Mohawk River, and was named for its commander: Colonel Elias Dayton, who oversaw the troops of New Jersey’s Fourth Regiment. This was contributed by Ken D. Johnson, Fort Plank Historian and author of The Bloodied Mohawk: "Fort Dayton was indeed constructed in 1776, by troops of the Fourth New Jersey Regiment under the command of Colonel Elias Dayton. Joseph Bloomfield, an officer in Dayton's Regiment states that the fort was named after the Colonel and that the fort was so badly located, a second fortress had immediately erected to prevent the British from seizing it in the same manner they did Mount Independence on Lake Champlain. Thus, a heavy blockhouse was built on a hill overlooking Fort Dayton to protect it from bombardment from above. Contemporary maps suggest that the works included a church which was located in the now northern part of the Village of Herkimer." This material is covered further in The Bloodied Mohawk published in June of 2000 by Picton Press of Camden, Maine and in an article entitled "In Defense of the Facts."

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 bales and four bastions; impressively, the fort’s construction was started and completed in a matter of weeks. The fort was built in 1687, and after a taxing winter, where the vast majority of the garrison perished due to inadequate supplies, the fort was left with very few men. After being besieged, the fort was abandoned by August of 1688, and was promptly burned by Senecan forces.

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 the blockhouse, armed with a 24-pounder cannon. The fort was named for Captain Decatur, an American Naval officer from Maryland.

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 by Joseph Brant, a Mohawk military leader aligned with Great Britain.

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 today's Bayonne-Staten Island ferry landing in Port Richmond on Kill van Kull.

(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 1776 amidst the fighting. By September, the fort was destroyed. The modern-day site can be found near Dwight and Beard Street. (2): Another name for Middle Fort 1780, see Middle Fort.

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.

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.

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 defense of NY Harbor ordered by Gen Joseph Smith, Chief of Engineers. (Bath Beach, Utrecht Bay, Denyse's Heights, Princess Bay, Jamaica Bay - Decatur) Records are not clear that all of the sites were constructed. Probably blockhouse referred to as part of Fort Lewis 1814 on Denyse Heights.

Fort De Sables was built in 1717, in Monroe County, New York. It was built by French forces and primarily served as a trading post to exchange goods with the Seneca Native American tribe. Unfortunately, the site was destroyed centuries later as it stood in the path of a planned expressway and was demolished to make room for the project.

Fort Devens was constructed in 1757 in Sullivan County, New York. The fort was under the supervision of General James Clinton, and the blockhouse was involved in fighting during the Seven Years’ war.

Fort Dewitt was built in Orange County, New York during the Seven Years’ War, in 1757. Located in Deerpark, the fort was one of five constructed for the Orange and Ulster County militias.

Fort Deyo's Hill, 1757, Ulster County, US Route 209 North of Kerhonkson, Town of Rochester. One of a series of blockhouses.

Fort Diamond, Earlier name for Fort Lafayette in New York Harbor.

At Dobbs Ferry, during the Revolutionary War, a series of forts was constructed by the Continental Army. The purpose of the forts was to defend Westchester from advances by British forces. The main fortification stood atop a horseshoe shaped projection overlooking the east shore ferry landing and was equipped with two redoubts. However, the Continental Army was forced to retreat after the British successfully captured New York City in 1776. By January of 1777, though, Westchester’s forts were re-occupied by Patriot forces.

Dolson Blockhouse was built in Orange County, New York, in the eighteenth century. The 1735 fort was constructed in Middletown by British forces to thwart attacks by Native American and French armies. Originally, it was a fortified log house.

Camp Drum is located in Watertown, New York, in Jefferson County. The facility, then known as Pine Camp, opened its doors in 1908. The camp was used by American troops to practice tactical maneuvers during peacetime, and eventually saw further development leading up to the nation’s entrance into the Second World War. In 1951, the camp was renamed for Lieutenant General Hugh A. Drum, who commanded the First United States Army during the Second World War. Following an Allied victory, and the subsequent conclusion of the Second World War, the base provided training for soldiers during the Korean War. Today, the post remains as a training site for American forces.

Fort Drum, 1974, Jefferson County, Watertown. Camp Drum was designated Fort Drum in 1974 and a permanent garrison was assigned. In January 1984, the Department of the Army announced it was studying selected Army posts to house a new light infantry division. On September 11, 1984, the announcement was made that Fort Drum would be the new home of the 10th Light Infantry Division. The first division troops arrived at Fort Drum on December 3, 1984 and the unit was officially activated on February 13, 1985. The name was changed to the 10th Mountain Division (Light Infantry) at that time. The division reached full strength in 1989. Between 1986 and 1992, 130 new buildings, 35 miles of roads, and 4,272 sets of family housing units were built at a cost of $1.3 billion. See also Pine Camp and Camp Drum.

(1) Louis DuBois lived from 1626 to 1696 and founded the neighborhood where this New Paltz blockhouse would be built just years after his death. The Ulster County fort, erected in 1705, was built from stone. The British fortification brandished gun ports, and a lookout window. After further construction in 1935, the site came to be known as DuBois House. (2): In Cobleskill, Schoharie County, New York, a blockhouse was built in 1779. It was named for Colonel Lewis DuBois, of the Continental Army. This fort is not to be confused with the fortification of the same name, built in New Paltz, which, coincidentally, was likely named for Lewis’ grandfather, Louis, who was the family’s patriarch.

Dudley's Battery, 1812-14, Erie County, Buffalo. Just North of Ferry Street, no description of guns mounted. Gibson's Battery to its South, and Swift's Battery to its North. See also Buffalo Batteries for a complete listing of batteries at this time.

Dutch Church fort was a stone construction assembled during the 1770s. The fortified church was destroyed in a raid by American general, William Alexander, also known as Lord Stirling, in 1780. The fort was located on Staten Island, at Port Richmond.

Camp Dutchess was a temporary Civil War encampment built in 1862. The encampment was named for where it was built, in Dutchess County, specifically in the city of Poughkeepsie. The camp housed soldiers belonging to New York’s 150th Volunteer Infantry Division, who fought for the Union during the Civil War.