Third System of US seacoast defense

All labels observed (11)

Label	Occurrences
Third System of U.S. coastal fortifications	4
Third System of U.S. seacoast defenses	4
Third System of US seacoast fortifications	4
Third System of U.S. seacoast fortifications	3
Third System of US seacoast defense canonical	3
Third System of US coastal defenses	2
Third System of US coastal fortifications	2
Third System coastal fortification	1
Third System of U.S. coastal defenses	1
United States Third System coastal defenses	1
United States post–War of 1812 seacoast defense system	1

How this entity was disambiguated

This entity first appeared as the object of triple T470728 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Third System of US seacoast defense
Context triple: [Fort Sumter, builtDuring, Third System of US seacoast defense]

A. Chain Home radar network
The Chain Home radar network was Britain’s pioneering early-warning radar system that provided long-range detection of enemy aircraft during the early years of World War II, crucially aiding air defense in the Battle of Britain.
B. Fort Wadsworth
Fort Wadsworth is a historic former military installation and coastal defense fortification located at the Narrows in New York Harbor, now part of the Gateway National Recreation Area.
C. Patriot missile system
The Patriot missile system is a long-range, all-altitude, air-defense system designed to detect, track, and intercept incoming aircraft, missiles, and drones, widely used by the U.S. and allied militaries.
D. Naval Facilities Engineering Systems Command
Naval Facilities Engineering Systems Command is a United States Navy organization responsible for planning, building, and maintaining naval shore facilities and infrastructure worldwide.
E. Treasure Island Naval Station (former)
Treasure Island Naval Station (former) was a decommissioned U.S. Navy base located on San Francisco Bay’s man-made Treasure Island, historically used for training, administration, and support operations.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Third System of US seacoast defense
Target entity description: The Third System of US seacoast defense was a 19th-century American coastal fortification program that constructed large, permanent masonry forts to protect key harbors and strategic points along the nation’s shoreline.

A. Chain Home radar network
The Chain Home radar network was Britain’s pioneering early-warning radar system that provided long-range detection of enemy aircraft during the early years of World War II, crucially aiding air defense in the Battle of Britain.
B. Fort Wadsworth
Fort Wadsworth is a historic former military installation and coastal defense fortification located at the Narrows in New York Harbor, now part of the Gateway National Recreation Area.
C. Patriot missile system
The Patriot missile system is a long-range, all-altitude, air-defense system designed to detect, track, and intercept incoming aircraft, missiles, and drones, widely used by the U.S. and allied militaries.
D. Naval Facilities Engineering Systems Command
Naval Facilities Engineering Systems Command is a United States Navy organization responsible for planning, building, and maintaining naval shore facilities and infrastructure worldwide.
E. Treasure Island Naval Station (former)
Treasure Island Naval Station (former) was a decommissioned U.S. Navy base located on San Francisco Bay’s man-made Treasure Island, historically used for training, administration, and support operations.
F. None of above. chosen

Statements (50)

Predicate	Object
instanceOf	United States military program ⓘ coastal fortification program ⓘ
appliesToJurisdiction	United States coastline ⓘ
architecturalStyle	masonry fortification ⓘ
country	United States ⓘ linked to: United States of America
endTime	late 19th century ⓘ
follows	Second System of US seacoast defense ⓘ
hasGoal	defense of strategic coastal points ⓘ protection of key harbors ⓘ
hasPart	Fort Adams ⓘ linked to: Fort Adams State Park Fort Barrancas (Third System reconstruction) ⓘ linked to: Fort Barrancas Fort Caswell ⓘ Fort Clinch ⓘ linked to: Fort Clinch State Park Fort Delaware ⓘ linked to: Fort Delaware State Park Fort Gaines ⓘ Fort Gorges ⓘ Fort Independence (Boston Harbor, rebuilt) ⓘ Fort Jackson (Louisiana) ⓘ Fort Jefferson ⓘ Fort Knox (Maine) ⓘ Fort Macomb ⓘ Fort Macon ⓘ Fort Massachusetts (Massachusetts) ⓘ linked to: Fort Massachusetts (Mississippi) Fort Massachusetts (Mississippi) ⓘ Fort Massachusetts (Ship Island) ⓘ Fort McRee ⓘ Fort Monroe ⓘ linked to: Fort Monroe, Virginia Fort Morgan ⓘ Fort Moultrie (Third System reconstruction) ⓘ linked to: Fort Moultrie Fort Pickens ⓘ Fort Pike ⓘ Fort Point (Boston) ⓘ linked to: Fort Point Cove Fort Point (Galveston, planned/partial) ⓘ Fort Point (San Francisco) ⓘ Fort Popham ⓘ linked to: Fort Gorges Fort Pulaski ⓘ linked to: Fort Pulaski National Monument Fort Schuyler ⓘ Fort St. Philip ⓘ Fort Sumter ⓘ Fort Taylor ⓘ Fort Totten (New York) ⓘ Fort Trumbull (Third System reconstruction) ⓘ Fort Warren ⓘ Fort Washington (Potomac River) ⓘ
partOf	United States seacoast defense systems ⓘ
replacedBy	Endicott Period coast defenses ⓘ
significantEvent	American Civil War ⓘ
startTime	circa 1816 ⓘ
uses	brick masonry ⓘ stone masonry ⓘ

How these facts were elicited