Fort Hamilton

Fort Hamilton

Company type	Military installation
Industry	Defense
Founded	1831
Headquarters	Brooklyn, New York City , United States
Area served	New York metropolitan area
Owner	United States Department of Defense

Fort Hamilton is a United States Army base situated in the southwestern area of Brooklyn, New York City, adjacent to the neighborhoods of Bay Ridge and Dyker Heights. It falls under the jurisdiction of the Military District of Washington and serves as a support facility for the Army National Guard and United States Army Reserve units within the New York metropolitan region. The original fortification was finalized in 1831, with major expansions occurring during the 1870s and early 20th century. Currently, roughly half of the initial structure remains, as most defensive works have been removed or buried.

History

On July 4, 1776, during the American Revolution, a modest American artillery position at this site engaged British naval vessels, marking one of the earliest military actions conducted there.

The War of 1812 highlighted the need for enhanced coastal defenses, leading to the construction of new forts as part of the third system of United States seacoast fortifications. The foundation stone of Fort Hamilton was set by French military engineer Simon Bernard on June 11, 1825. Bernard, who had served under Napoleon, designed the fort at an estimated cost of $500,000. Initially, it accommodated Battery F of the 4th Air Defense Artillery Regiment.

Fort Hamilton was primarily intended to defend against landward threats to nearby Fort Lafayette (which was demolished in the 1960s to make way for bridge construction). The fort features a trapezoidal layout with two levels of artillery placements—casemated guns within the walls and barbette-mounted cannons on the roof—as well as musket loopholes on three sides facing inland. Defensive elements include a dry moat protected by caponiers and a sally port located on the seaward front. Additionally, a separate redoubt provided extra protection from land-based attacks.

Though referred to as Fort Hamilton since 1826, it received its official designation honoring Alexander Hamilton in the 20th century. In 1839, it became New York State's first National Guard training ground when the 27th Regiment was authorized to conduct drills there. The following year, an appropriation of $20,000 was made for armament enhancements, with Captain Robert E. Lee appointed to oversee defensive improvements. Lee served as post engineer from 1841 until 1846 and also contributed to fort designs at Fort Richmond and Fort Tompkins in the region. Distinguished officers such as Lieutenant Thomas "Stonewall" Jackson and Captain Abner Doubleday, who assumed command in 1861 after his service at Fort Sumter, were among those stationed at Fort Hamilton.

Civil War

Throughout the Civil War period, Fort Hamilton’s garrison grew significantly. A naval barrier stretched across the Narrows helped this fort and its counterparts on Staten Island (now known as Fort Wadsworth) secure New York Harbor against potential Confederate incursions. The forts also provided forces to quell the New York Draft Riots in 1863. During this time, Fort Hamilton served as a prisoner-of-war camp and saw the addition of an external "New Battery" equipped with artillery.

The development of rifled cannon during the war rendered traditional vertical masonry walls ineffective for coastal defense. In response, new batteries were constructed featuring artillery positioned behind low earthen embankments and brick magazines covered by substantial earthworks. At Fort Hamilton, construction began in 1871 on an eight-gun water battery along with plans for a fifteen-gun mortar battery; however, the mortar battery was never completed or armed. Due to budget constraints in the late 1870s, further modernization efforts were delayed for nearly two decades.

Endicott program

In 1885, the Board of Fortifications, chaired by Secretary of War William C. Endicott, proposed extensive enhancements to the United States' coastal defenses. This initiative introduced advanced breech-loading rifled artillery and new battery constructions. The majority of these proposals were implemented under what became known as the Endicott program, leading to significant modifications at Fort Hamilton. Over half of the original fort was demolished to make way for reinforced concrete batteries. Subsequently, Fort Hamilton was incorporated into the Artillery District of New York, which was renamed in 1913 as the Coast Defenses of Southern New York.

The table below outlines the gun batteries established at Fort Hamilton between 1898 and 1905, detailing the quantity of guns, their types, carriage mechanisms, and operational periods:

Name	Number of guns	Type of gun	Carriage style	Service years
Piper	8	12-inch mortar	barbette	1901–1942
Harvey Brown	2	12-inch gun	disappearing	1902–?
Doubleday	2	12-inch gun	disappearing	1900–1943
Neary	2	12-inch gun M1888	barbette M1892	1900–1937
Gillmore	4	10-inch gun M1895	disappearing	1899–1942
Spear	3	10-inch gun	disappearing	1898–1917
Burke	4	6-inch gun M1900	pedestal M1900	1903–1917
Livingston	2	6-inch gun M1905	disappearing M1903	1905–c.1920
Livingston	2	6-inch gun M1900	pedestal M1900	1905–1948
Johnston	2	6-inch gun M1900	pedestal M1900	1902–1943
Mendenhall	4	6-inch gun	disappearing	1905–1917
Griffin	2	4.72-inch/45 caliber Armstrong gun	pedestal	1899–1913
Griffin	2	3-inch gun M1898	masking parapet M1898	1902–1920
Griffin	2	3-inch gun M1903	pedestal M1903	1903–1946

Several batteries—specifically Burke, Johnston, Brown, and Griffin—were located directly before the remnants of the original fort, with Battery Griffin positioned below them. Other batteries extended toward the southeast from the old fort structure, while Battery Piper was placed well behind these positions. Initially, Battery Griffin housed a combination of two M1898 and two M1903 3-inch guns; its 4.72-inch Armstrong guns were rapidly installed during the Spanish–American War in 1898 as British imports because most Endicott-era installations were still incomplete. In 1913, these Armstrong guns were relocated to Fort Kamehameha in Hawaii to centralize this artillery type in that region. Notably, Battery Livingston featured both disappearing and pedestal-mounted 6-inch guns. Originally constructed as a single seven-gun battery, Batteries Gillmore and Spear were separated in 1903 to improve fire control effectiveness.

World War I

With the United States entering World War I, Fort Hamilton experienced considerable adjustments similar to other coastal defense installations. Numerous temporary structures were built to support the surge of recruits and units preparing for overseas deployment. The Coast Artillery Corps provided most of the trained personnel operating heavy and railway artillery during the conflict, primarily using French and British equipment. Many soldiers were reassigned to newly formed heavy artillery regiments. Several guns at Fort Hamilton were removed for potential deployment on the Western Front; however, only a limited number saw action due to shipping constraints and training requirements. Battery Spear’s trio of 10-inch guns was taken out for possible conversion into railway artillery, while eight 6-inch guns from Batteries Burke and Mendenhall were dismounted for use on field carriages. Two of these guns, along with four mortars from Battery Piper's original eight 12-inch mortars, constituted the first batteries at nearby Fort Tilden in Far Rockaway, Queens. The reduction by half of Battery Piper’s mortars aimed to enhance firing efficiency among those remaining. None of these artillery pieces were returned to Fort Hamilton afterward.

Interwar Period

Following the conclusion of World War I, Fort Hamilton underwent several modifications. Circa 1920, the two 6-inch disappearing guns from Battery Livingston were relocated to West Point for use in cadet training; these particular guns are currently preserved at Fort Pickens and Battery Chamberlin within the Presidio of San Francisco, marking them as the final 6-inch disappearing guns remaining outside the Philippines. In 1920, Battery Griffin's pair of 3-inch M1898 guns were removed amid a broader phase-out of specific artillery types. By 1921, Fort Hancock in New Jersey had completed two long-range 12-inch batteries, and by 1924, the installation of 16-inch guns at Fort Tilden diminished Fort Hamilton’s significance within New York’s coastal defense network. The two 12-inch guns at Battery Neary were dismantled in 1937.

World War II

Throughout World War II, Fort Hamilton mainly served as a mobilization hub. Most artillery pieces were gradually decommissioned except for Battery Livingston’s remaining pair of 6-inch pedestal guns and Battery Griffin’s two 3-inch guns. Newer coastal defenses, including 16-inch gun installations at the Highlands Military Reservation in New Jersey and Fort Tilden, took precedence over older fortifications. Additionally, an anti-aircraft battery, likely outfitted with 90 mm guns, was stationed at the fort during this era.

Postwar Era

After World War II, fixed coastal artillery became obsolete. The final coast defense gun at Fort Hamilton was removed in 1948. Between 1952 and 1954, the fort operated a battery of four 120 mm M1 guns as part of Cold War air defense measures. In the late 1950s through early 1960s, many disused gun batteries were either demolished or buried to make way for construction projects such as the Verrazano-Narrows Bridge and the Belt Parkway.

Military Units

Several Regular Army units have been stationed at Fort Hamilton:

• 12th Infantry Regiment: established October 20, 1861
• 21st Infantry Regiment: established May 20, 1862
• 5th Coast Artillery Regiment: formed in 1924

During the 1960s, Fort Hamilton became home to the U.S. Army Chaplain School following its relocation from the now-closed Fort Slocum. This institution trained numerous chaplains and assistants from the Army, Reserve, and National Guard before moving first to Fort Wadsworth and subsequently to Fort Jackson, South Carolina.

Present Day

Fort Hamilton remains the sole active-duty military installation operated by the DoD within New York City. Historically, it has been connected with other local military sites such as Fort Wadsworth, Fort Tilden, Fort Totten, Governors Island, and the Brooklyn Navy Yard.

Currently, the post hosts several key units including the New York City Recruiting Battalion, Military Entrance Processing Station, Headquarters of the North Atlantic Division of the United States Army Corps of Engineers, the 1179th Transportation Brigade, and the geographically separated 722nd Aeromedical Staging Squadron affiliated with the 439th Airlift Wing under the Air Force Reserve Command. It also supports multiple Army Reserve and New York Army National Guard units such as the 133d Quartermaster Company, Company C/642d Aviation Support Battalion, 222d Chemical Company, and the 107th Military Police Company. Administration falls under the jurisdiction of the United States Army Installation Management Command based at Fort Sam Houston in Texas.

The construction of the Verrazzano-Narrows Bridge in the early 1960s resulted in removal of historic structures including Fort Lafayette. Concurrently, efforts to preserve military heritage intensified, leading to establishment of the Harbor Defense Museum at Fort Hamilton.

Notable landmarks on site include the original fort structure now serving as a Community Club; a caponier that houses the Harbor Defense Museum; the historic Robert E. Lee House; and Colonels' Row townhouses—all recognized on the National Register of Historic Places.

In recent decades, a historic parade ground behind former headquarters was redeveloped into private housing while retaining heritage features such as a flagpole and artillery piece. In 2007, brick barracks located within Pershing Loop—previously occupied by ceremonial platoons and military police—were demolished. The ceremonial platoon provided funeral honors and color guard services throughout New York City and adjacent areas.

Among military artifacts present nearby is a Civil War-era experimental 20-inch Rodman gun situated in John Paul Jones Park—the largest weapon of its kind from that period—and an ex-Navy 12"/45 caliber Mark V Mod 8 gun, representing typical armaments from the Endicott Era.

Education

Residents living on the base and their families are served by the New York City Department of Education district. There are no educational institutions located within the installation's perimeter. The designated school for grades K through 8 is P.S./I.S. 104 The Fort Hamilton School, while students in higher grades attend Fort Hamilton High School.

In popular culture

In the realm of Marvel Comics, G.I. Joe issue number 2 from 1982 mentions that Cobra detainees are confined at Fort Hamilton's stockade.

Fort Hamilton is depicted in season 19, episode 18 ("Service") of Law and Order: Special Victims Unit, and it forms the central backdrop of Nelson DeMille’s novel Word of Honor.

The fort also appears in The Lords of Flatbush, featuring an Army officer stationed there, with scenes highlighting the officers' club at Fort Hamilton.

See also

• Seacoast defense in the United States
• United States Army Coast Artillery Corps

External links

• Fort Hamilton (U.S. Army Garrison)
• Harbor Defense Museum official Facebook page
• Harbor Defense Museum Official site
• Harbor Defense Museum at NYC Arts.org
• Harbor Defense Museum at New York magazine
• North Atlantic Division, U.S. Army Corps of Engineers
• New York State Military Museum - Fort Hamilton
• American Forts Network—US, Canadian, and Central American forts
• Coast Defense Study Group: US coastal forts and batteries
• FortWiki—CONUS and Canadian forts