SS Mayaguez
E166511
SS Mayaguez was a U.S. merchant container ship best known for its 1975 seizure by Cambodian Khmer Rouge forces, which triggered the last official battle involving American ground troops in the Vietnam War era.
All labels observed (2)
| Label | Occurrences |
|---|---|
| SS Mayaguez canonical | 4 |
| USS Mayaguez | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1454699 — 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: SS Mayaguez Context triple: [Mayaguez incident, involvesVessel, SS Mayaguez]
-
A.
M/V Columbia
M/V Columbia is a mainline passenger and vehicle ferry that serves as one of the flagship vessels of the Alaska Marine Highway System, operating along coastal routes in Alaska and the Pacific Northwest.
-
B.
M/V Tustumena
M/V Tustumena is a rugged Alaska Marine Highway ferry known for serving remote coastal communities and challenging open-ocean routes in the Gulf of Alaska and Aleutian Islands.
-
C.
M/V LeConte
M/V LeConte is an Alaska Marine Highway System ferry that provides passenger and vehicle service to coastal communities in Southeast Alaska.
-
D.
M/V Chenega
M/V Chenega is a high-speed passenger and vehicle ferry that operated as part of Alaska’s state-run Alaska Marine Highway System, serving coastal communities in Southeast and Southcentral Alaska.
-
E.
M/V Fairweather
M/V Fairweather is a high-speed catamaran ferry that operated in Alaska’s Marine Highway System, providing fast passenger and vehicle service between coastal communities.
- 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: SS Mayaguez Target entity description: SS Mayaguez was a U.S. merchant container ship best known for its 1975 seizure by Cambodian Khmer Rouge forces, which triggered the last official battle involving American ground troops in the Vietnam War era.
-
A.
M/V Columbia
M/V Columbia is a mainline passenger and vehicle ferry that serves as one of the flagship vessels of the Alaska Marine Highway System, operating along coastal routes in Alaska and the Pacific Northwest.
-
B.
M/V Tustumena
M/V Tustumena is a rugged Alaska Marine Highway ferry known for serving remote coastal communities and challenging open-ocean routes in the Gulf of Alaska and Aleutian Islands.
-
C.
M/V LeConte
M/V LeConte is an Alaska Marine Highway System ferry that provides passenger and vehicle service to coastal communities in Southeast Alaska.
-
D.
M/V Chenega
M/V Chenega is a high-speed passenger and vehicle ferry that operated as part of Alaska’s state-run Alaska Marine Highway System, serving coastal communities in Southeast and Southcentral Alaska.
-
E.
M/V Fairweather
M/V Fairweather is a high-speed catamaran ferry that operated in Alaska’s Marine Highway System, providing fast passenger and vehicle service between coastal communities.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
container ship
ⓘ
merchant ship ⓘ |
| aftermath |
U.S. casualties during rescue attempt
ⓘ
heightened U.S. military response in Gulf of Thailand ⓘ |
| associatedWith |
Gerald Ford administration
ⓘ
Khmer Rouge–United States relations ⓘ Koh Tang Island battle ⓘ U.S. foreign policy in Southeast Asia ⓘ |
| cargoType | containerized cargo ⓘ |
| category |
Cold War naval incidents
ⓘ
Container ships ⓘ Maritime incidents in 1975 ⓘ Merchant ships of the United States ⓘ Ships involved in military operations ⓘ |
| countryOfRegistry |
United States
ⓘ
linked to:
United States of America
|
| crewNationality | American ⓘ |
| crewTakenHostage | true ⓘ |
| dateOfSeizure | 1975-05-12 ⓘ |
| era |
Cold War
ⓘ
post–Vietnam War period ⓘ |
| event | Mayaguez incident ⓘ |
| flag |
United States
ⓘ
linked to:
United States of America
|
| hasCrewRole | civilian mariners ⓘ |
| historicalSignificance |
last major U.S. combat action in Indochina
ⓘ
symbolized U.S. resolve after Vietnam withdrawal ⓘ |
| incidentCharacterization | act of piracy as claimed by the United States ⓘ |
| involvedCountry |
Cambodia
ⓘ
United States ⓘ
linked to:
United States of America
|
| legalStatusAtSeizure | commercial vessel in international waters ⓘ |
| notableFor |
1975 seizure by Khmer Rouge forces
ⓘ
being involved in the last official battle involving American ground troops of the Vietnam War era ⓘ incident that led to the Mayaguez rescue operation ⓘ |
| operator | Sea-Land Service, Inc. ⓘ |
| ownedBy | Sea-Land Service, Inc. ⓘ |
| placeOfSeizure |
Gulf of Thailand
ⓘ
waters near Cambodia ⓘ |
| relatedEvent |
end of the Vietnam War
ⓘ
fall of Saigon ⓘ |
| relatedMilitaryOperation |
Mayaguez rescue operation
ⓘ
linked to:
Mayaguez incident
U.S. Marine landing on Koh Tang Island ⓘ |
| seizedBy |
Cambodian communist forces
ⓘ
linked to:
Kampuchean Revolutionary Army
Khmer Rouge ⓘ |
| serviceType | commercial cargo transport ⓘ |
| statusDuringIncident | unarmed merchant vessel ⓘ |
| typeOfPropulsion | motor ship ⓘ |
| usedInConflict | Vietnam War era ⓘ |
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: SS Mayaguez Description of subject: SS Mayaguez was a U.S. merchant container ship best known for its 1975 seizure by Cambodian Khmer Rouge forces, which triggered the last official battle involving American ground troops in the Vietnam War era.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: SS Mayaguez