Fort Gratiot
E457717
Fort Gratiot was a 19th-century U.S. Army fortification in Michigan that guarded the strategic junction of the St. Clair River and Lake Huron.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Fort Gratiot canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T4640169 — 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: Fort Gratiot Context triple: [Fort Gratiot Township, Michigan, namedAfter, Fort Gratiot]
-
A.
Fort DeRussy
Fort DeRussy is a former U.S. Army coastal defense installation in Honolulu, Hawaii, now largely serving as a military recreation area and green space near Waikiki.
-
B.
Fort Gustavus
Fort Gustavus was a Dutch colonial fortification in Bengal that served as a strategic trading and military outpost for the Dutch East India Company.
-
C.
Fort Neally
Fort Neally is a historic frontier fortification site located in Berkeley County, West Virginia, associated with early colonial-era defense and settlement in the region.
-
D.
Fort Cronkhite
Fort Cronkhite is a former World War II-era coastal defense fortification in Marin County, California, now preserved as part of the Golden Gate National Recreation Area and used for recreation and historic interpretation.
-
E.
Fort Steuben
Fort Steuben was an 18th-century U.S. military outpost and surveying base on the Ohio River that later gave rise to the city of Steubenville, Ohio.
- 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: Fort Gratiot Target entity description: Fort Gratiot was a 19th-century U.S. Army fortification in Michigan that guarded the strategic junction of the St. Clair River and Lake Huron.
-
A.
Fort DeRussy
Fort DeRussy is a former U.S. Army coastal defense installation in Honolulu, Hawaii, now largely serving as a military recreation area and green space near Waikiki.
-
B.
Fort Gustavus
Fort Gustavus was a Dutch colonial fortification in Bengal that served as a strategic trading and military outpost for the Dutch East India Company.
-
C.
Fort Neally
Fort Neally is a historic frontier fortification site located in Berkeley County, West Virginia, associated with early colonial-era defense and settlement in the region.
-
D.
Fort Cronkhite
Fort Cronkhite is a former World War II-era coastal defense fortification in Marin County, California, now preserved as part of the Golden Gate National Recreation Area and used for recreation and historic interpretation.
-
E.
Fort Steuben
Fort Steuben was an 18th-century U.S. military outpost and surveying base on the Ohio River that later gave rise to the city of Steubenville, Ohio.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
U.S. Army fort
ⓘ
military fortification ⓘ |
| associatedWithConflict | War of 1812 ⓘ |
| borderedBy |
Canada (across the St. Clair River)
ⓘ
linked to:
Canada (across St. Clair River)
|
| builtDuring | War of 1812 era ⓘ |
| constructionStart | 1814 ⓘ |
| continent | North America ⓘ |
| controlledBy | United States Army ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| fortType |
frontier fort
ⓘ
river fort ⓘ |
| garrisonedBy | U.S. Army troops ⓘ |
| geographicalContext |
head of the St. Clair River
ⓘ
southern end of Lake Huron ⓘ |
| guardedRoute |
shipping lanes between Lake Huron and Lake St. Clair
ⓘ
water route between upper Great Lakes and Detroit ⓘ |
| hasStructure |
barracks
ⓘ
blockhouses ⓘ officers' quarters ⓘ parade ground ⓘ stockade ⓘ |
| heritageStatus | historic site ⓘ |
| locatedAtConfluence | junction of the St. Clair River and Lake Huron ⓘ |
| locatedIn |
Michigan
ⓘ
Port Huron, Michigan ⓘ
linked to:
Port Huron, Michigan, United States
|
| locatedInCounty | St. Clair County, Michigan ⓘ |
| locatedInRegion | Great Lakes region ⓘ |
| locatedOnWaterBody | Lake Huron ⓘ |
| locatedOnWaterway | St. Clair River ⓘ |
| militaryBranch | United States Army ⓘ |
| namedAfter | Charles Gratiot ⓘ |
| namedFor | Colonel Charles Gratiot ⓘ |
| nearbyInfrastructure |
Fort Gratiot Light
ⓘ
linked to:
Fort Gratiot Lighthouse
|
| nearbySettlement | Port Huron ⓘ |
| partOf | U.S. system of Great Lakes fortifications ⓘ |
| primaryConstructionMaterial | wood ⓘ |
| relatedTo |
Fort Gratiot Light
ⓘ
linked to:
Fort Gratiot Lighthouse
|
| status | decommissioned ⓘ |
| strategicImportance |
guarded the entrance from Lake Huron to the St. Clair River
ⓘ
protected shipping between the upper Great Lakes and lower Great Lakes ⓘ |
| theaterOfOperations |
U.S.–Canada border region
ⓘ
linked to:
Canada–United States border region
|
| timePeriod | 19th century ⓘ |
| usedFor |
border defense
ⓘ
coastal defense ⓘ harbor defense ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Fort Gratiot Description of subject: Fort Gratiot was a 19th-century U.S. Army fortification in Michigan that guarded the strategic junction of the St. Clair River and Lake Huron.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.