2nd Battalion, 28th Marines
E469927
The 2nd Battalion, 28th Marines is a United States Marine Corps infantry battalion best known for its role in the Battle of Iwo Jima during World War II, including participation in the iconic flag-raising on Mount Suribachi.
All labels observed (2)
| Label | Occurrences |
|---|---|
| 2nd Battalion, 28th Marines canonical | 1 |
| Easy Company, 2nd Battalion, 28th Marines | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4744836 — 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: 2nd Battalion, 28th Marines Context triple: [28th Marine Regiment, hasBattalion, 2nd Battalion, 28th Marines]
-
A.
1st Battalion, 28th Marines
The 1st Battalion, 28th Marines is a United States Marine Corps infantry battalion that served as a key combat unit within the 28th Marine Regiment, notably active during World War II.
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B.
2nd Battalion, 26th Marines
The 2nd Battalion, 26th Marines was a U.S. Marine Corps infantry battalion that saw notable combat service during the Vietnam War.
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C.
2nd Battalion, 1st Marines
The 2nd Battalion, 1st Marines is an infantry battalion of the United States Marine Corps known for its combat deployments and service in major conflicts as part of the 1st Marine Division.
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D.
2nd Battalion, 8th Marines
The 2nd Battalion, 8th Marines is an infantry battalion of the United States Marine Corps known for its combat deployments and service in major conflicts including World War II, Vietnam, Iraq, and Afghanistan.
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E.
2nd Battalion, 7th Marines
The 2nd Battalion, 7th Marines is a U.S. Marine Corps infantry battalion renowned for its combat service in major conflicts from World War II through the Global War on Terror.
- 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: 2nd Battalion, 28th Marines Target entity description: The 2nd Battalion, 28th Marines is a United States Marine Corps infantry battalion best known for its role in the Battle of Iwo Jima during World War II, including participation in the iconic flag-raising on Mount Suribachi.
-
A.
1st Battalion, 28th Marines
The 1st Battalion, 28th Marines is a United States Marine Corps infantry battalion that served as a key combat unit within the 28th Marine Regiment, notably active during World War II.
-
B.
2nd Battalion, 26th Marines
The 2nd Battalion, 26th Marines was a U.S. Marine Corps infantry battalion that saw notable combat service during the Vietnam War.
-
C.
2nd Battalion, 1st Marines
The 2nd Battalion, 1st Marines is an infantry battalion of the United States Marine Corps known for its combat deployments and service in major conflicts as part of the 1st Marine Division.
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D.
2nd Battalion, 8th Marines
The 2nd Battalion, 8th Marines is an infantry battalion of the United States Marine Corps known for its combat deployments and service in major conflicts including World War II, Vietnam, Iraq, and Afghanistan.
-
E.
2nd Battalion, 7th Marines
The 2nd Battalion, 7th Marines is a U.S. Marine Corps infantry battalion renowned for its combat service in major conflicts from World War II through the Global War on Terror.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
United States Marine Corps unit
ⓘ
infantry battalion ⓘ |
| allegiance |
United States of America
ⓘ
surface form:
United States
|
| associatedLocation |
Iwo Jima
NERFINISHED
ⓘ
Mount Suribachi NERFINISHED ⓘ |
| associatedWith |
5th Marine Division operations on Iwo Jima
ⓘ
Joe Rosenthal photograph "Raising the Flag on Iwo Jima" NERFINISHED ⓘ Raising the Flag on Iwo Jima NERFINISHED ⓘ |
| battle | Battle of Iwo Jima NERFINISHED ⓘ |
| branchLabel | USMC NERFINISHED ⓘ |
| branchSpecialty | expeditionary warfare ⓘ |
| category | United States Marine Corps World War II battalion ⓘ |
| combatFunction |
close combat
ⓘ
seizure of key terrain ⓘ |
| conflict | World War II ⓘ |
| country | United States of America ⓘ |
| decoratedFor | actions during the Battle of Iwo Jima ⓘ |
| engagement |
Iwo Jima landings
NERFINISHED
ⓘ
assault on southern sector of Iwo Jima ⓘ |
| era | World War II era ⓘ |
| forceType | Marine infantry ⓘ |
| garrisonLabel | Headquarters ⓘ |
| heritage | US Marine Corps combat tradition in the Pacific War ⓘ |
| higherFormation | V Amphibious Corps (during World War II) NERFINISHED ⓘ |
| historicalSignificance | symbol of US Marine Corps combat in the Pacific ⓘ |
| militaryBranch | United States Marine Corps ⓘ |
| militaryBranchType | Fleet Marine Force NERFINISHED ⓘ |
| militaryRole | frontline assault battalion ⓘ |
| mission | capture and secure Mount Suribachi ⓘ |
| notableEvent | capture of the summit of Mount Suribachi ⓘ |
| notableFor |
assault on Mount Suribachi
ⓘ
heavy combat against Japanese forces on Iwo Jima ⓘ participation in the flag-raising on Mount Suribachi ⓘ |
| operation | Amphibious assault on Iwo Jima ⓘ |
| parentOrganization | United States Marine Corps NERFINISHED ⓘ |
| partOf |
28th Marine Regiment
NERFINISHED
ⓘ
5th Marine Division NERFINISHED ⓘ |
| role | assault infantry ⓘ |
| service | United States Marine Corps infantry ⓘ |
| serviceBranch | United States Marine Corps ⓘ |
| symbolizedBy | US flag raised on Mount Suribachi NERFINISHED ⓘ |
| task | seizure of Mount Suribachi NERFINISHED ⓘ |
| theater | Pacific Theater of Operations NERFINISHED ⓘ |
| type | ground combat unit ⓘ |
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: 2nd Battalion, 28th Marines Description of subject: The 2nd Battalion, 28th Marines is a United States Marine Corps infantry battalion best known for its role in the Battle of Iwo Jima during World War II, including participation in the iconic flag-raising on Mount Suribachi.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Easy Company, 2nd Battalion, 28th Marines