28th Marine Regiment
E105335
The 28th Marine Regiment was a World War II United States Marine Corps infantry regiment best known for its role in the Battle of Iwo Jima, including the iconic flag-raising on Mount Suribachi.
All labels observed (2)
| Label | Occurrences |
|---|---|
| 28th Marine Regiment canonical | 1 |
| 28th Marine Regiment, 2nd Battalion | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T843921 — 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: 28th Marine Regiment Context triple: [5th Marine Division, component, 28th Marine Regiment]
-
A.
27th Marine Regiment
The 27th Marine Regiment was an infantry regiment of the United States Marine Corps that saw combat in the Pacific Theater during World War II.
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B.
26th Marine Regiment
The 26th Marine Regiment was a United States Marine Corps infantry regiment that saw notable combat service during World War II and the Vietnam War.
-
C.
7th Marine Regiment
The 7th Marine Regiment is a storied infantry regiment of the United States Marine Corps known for its combat service in major conflicts including World War II, Korea, Vietnam, and the Global War on Terror.
-
D.
11th Marine Regiment
The 11th Marine Regiment is a United States Marine Corps artillery regiment that provides fire support to the 1st Marine Division.
-
E.
8th Marines
The 8th Marines is a United States Marine Corps infantry regiment renowned for its fierce combat role in World War II Pacific campaigns, including the brutal amphibious assault on Tarawa.
- 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: 28th Marine Regiment Target entity description: The 28th Marine Regiment was a World War II United States Marine Corps infantry regiment best known for its role in the Battle of Iwo Jima, including the iconic flag-raising on Mount Suribachi.
-
A.
27th Marine Regiment
The 27th Marine Regiment was an infantry regiment of the United States Marine Corps that saw combat in the Pacific Theater during World War II.
-
B.
26th Marine Regiment
The 26th Marine Regiment was a United States Marine Corps infantry regiment that saw notable combat service during World War II and the Vietnam War.
-
C.
7th Marine Regiment
The 7th Marine Regiment is a storied infantry regiment of the United States Marine Corps known for its combat service in major conflicts including World War II, Korea, Vietnam, and the Global War on Terror.
-
D.
11th Marine Regiment
The 11th Marine Regiment is a United States Marine Corps artillery regiment that provides fire support to the 1st Marine Division.
-
E.
8th Marines
The 8th Marines is a United States Marine Corps infantry regiment renowned for its fierce combat role in World War II Pacific campaigns, including the brutal amphibious assault on Tarawa.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
United States Marine Corps regiment
ⓘ
infantry regiment ⓘ |
| allegiance |
United States of America
ⓘ
surface form:
United States
|
| associatedCampaign |
Ryukyu Islands campaign
ⓘ
surface form:
Volcano and Ryukyu Islands campaign
|
| associatedWith |
2nd Battalion, 28th Marines
ⓘ
surface form:
Easy Company, 2nd Battalion, 28th Marines
United States flag raising ⓘ
surface form:
First flag-raising on Mount Suribachi
United States flag raising ⓘ
surface form:
Second flag-raising on Mount Suribachi
Marine Corps War Memorial ⓘ
surface form:
United States Marine Corps War Memorial
|
| branchType | infantry ⓘ |
| category |
Infantry regiments of the United States Marine Corps
ⓘ
Marine regiments of the United States Marine Corps ⓘ Military units and formations of the United States Marine Corps in World War II ⓘ |
| commandStructure |
V Amphibious Corps
ⓘ
surface form:
V Amphibious Corps (at Iwo Jima)
|
| commemoratedBy |
Iwo Jima memorial ceremonies
ⓘ
USMC historical publications ⓘ |
| conflict | World War II ⓘ |
| country | United States of America ⓘ |
| decorations |
Presidential Unit Citation (United States)
ⓘ
surface form:
Presidential Unit Citation (Iwo Jima)
|
| engagement |
assault landings on Iwo Jima beaches
ⓘ
clearing operations on Mount Suribachi ⓘ |
| formedIn | World War II era ⓘ |
| garrisonLabel | United States Marine Corps ⓘ |
| hasBattalion |
1st Battalion, 28th Marines
ⓘ
2nd Battalion, 28th Marines ⓘ 3rd Battalion, 28th Marines ⓘ Headquarters Company, 28th Marines ⓘ |
| heritage | USMC World War II combat units ⓘ |
| higherFormation | United States Marine Corps ⓘ |
| historicalEra | 1940s ⓘ |
| militaryBranch | United States Marine Corps ⓘ |
| notableEngagement | Battle of Iwo Jima ⓘ |
| notableEvent |
capture of Mount Suribachi
ⓘ
flag-raising on Mount Suribachi ⓘ |
| notableFor |
assault on Mount Suribachi
ⓘ
securing the southern sector of Iwo Jima ⓘ |
| notableLocation | Iwo Jima ⓘ |
| notableOutcome | contributed to capture of Iwo Jima ⓘ |
| opponent | Imperial Japanese Army ⓘ |
| partOf | 5th Marine Division ⓘ |
| primaryMission | amphibious assault operations ⓘ |
| role | assault regiment at Iwo Jima ⓘ |
| serviceBranchRole | Fleet Marine Force ground combat element ⓘ |
| status | inactive ⓘ |
| symbolizedBy | flag-raising photograph by Joe Rosenthal ⓘ |
| theater |
Pacific Theater of Operations
ⓘ
surface form:
Pacific Theater
|
| 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: 28th Marine Regiment Description of subject: The 28th Marine Regiment was a World War II United States Marine Corps infantry regiment best known for its role in the Battle of Iwo Jima, including 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:
28th Marine Regiment, 2nd Battalion