Operation Hailstone
E13108
Operation Hailstone was a major U.S. Navy air and surface attack in February 1944 that devastated the Japanese naval and air base at Truk Lagoon in the Pacific Theater.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Operation Hailstone canonical | 11 |
| Attack on Truk | 1 |
| U.S. air raid on Truk (Operation Hailstone) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1745 — 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: Operation Hailstone Context triple: [World War II, hasPart, Operation Hailstone]
-
A.
Operation Dragoon
Operation Dragoon was the Allied amphibious invasion of southern France in August 1944 that helped liberate the region and support the broader campaign against Nazi Germany.
-
B.
Battle of Tarawa
The Battle of Tarawa was a brutal 1943 Pacific island assault in which U.S. Marines fought heavily entrenched Japanese forces on the atoll of Betio, marking one of World War II’s first major amphibious invasions against a strongly defended beachhead.
-
C.
Battle of Iwo Jima
The Battle of Iwo Jima was a major 1945 Pacific campaign clash between the United States and Japan, famed for its brutal fighting and the iconic flag-raising on Mount Suribachi.
-
D.
Operation Tidal Wave
Operation Tidal Wave was a major World War II Allied air raid targeting Romanian oil refineries at Ploiești in an effort to cripple Nazi Germany’s fuel supplies.
-
E.
Battle of Okinawa
The Battle of Okinawa was a major and brutal 1945 Pacific campaign between the United States and Japan, marked by intense ground combat, massive casualties, and kamikaze attacks, and is often seen as a decisive factor leading to the end of World War II.
- 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: Operation Hailstone Target entity description: Operation Hailstone was a major U.S. Navy air and surface attack in February 1944 that devastated the Japanese naval and air base at Truk Lagoon in the Pacific Theater.
-
A.
Operation Dragoon
Operation Dragoon was the Allied amphibious invasion of southern France in August 1944 that helped liberate the region and support the broader campaign against Nazi Germany.
-
B.
Battle of Tarawa
The Battle of Tarawa was a brutal 1943 Pacific island assault in which U.S. Marines fought heavily entrenched Japanese forces on the atoll of Betio, marking one of World War II’s first major amphibious invasions against a strongly defended beachhead.
-
C.
Battle of Iwo Jima
The Battle of Iwo Jima was a major 1945 Pacific campaign clash between the United States and Japan, famed for its brutal fighting and the iconic flag-raising on Mount Suribachi.
-
D.
Operation Tidal Wave
Operation Tidal Wave was a major World War II Allied air raid targeting Romanian oil refineries at Ploiești in an effort to cripple Nazi Germany’s fuel supplies.
-
E.
Battle of Okinawa
The Battle of Okinawa was a major and brutal 1945 Pacific campaign between the United States and Japan, marked by intense ground combat, massive casualties, and kamikaze attacks, and is often seen as a decisive factor leading to the end of World War II.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
military operation
ⓘ
naval air operation ⓘ |
| alsoKnownAs |
Attack on Truk
ⓘ
linked to:
Operation Hailstone
|
| belligerent |
Imperial Japanese Army Air Service
ⓘ
Imperial Japanese Navy ⓘ United States Navy ⓘ |
| codeName | Operation Hailstone ⓘ |
| commander |
Marc A. Mitscher
ⓘ
Raymond A. Spruance ⓘ |
| conductedBy |
United States Navy carrier task groups
ⓘ
linked to:
Carrier Strike Groups
|
| conflict | World War II ⓘ |
| country | United States of America ⓘ |
| destroyed |
Japanese aircraft at Truk
ⓘ
Japanese merchant ships at Truk ⓘ Japanese warships at Truk ⓘ shore installations at Truk ⓘ |
| endDate | 1944-02-18 ⓘ |
| followedBy | Mariana and Palau Islands campaign ⓘ |
| force |
Fast Carrier Task Force
ⓘ
linked to:
Third Fleet
U.S. Fifth Fleet ⓘ |
| location |
Caroline Islands
ⓘ
Chuuk Lagoon ⓘ Truk Lagoon ⓘ |
| notableFor |
creation of large ship graveyard at Truk Lagoon
ⓘ
scale of carrier air power employed ⓘ |
| objective |
destroy Japanese air power at Truk
ⓘ
destroy Japanese shipping at Truk ⓘ neutralize Truk as a Japanese naval base ⓘ |
| partOf |
Pacific Theater of Operations
ⓘ
linked to:
Pacific theater commands
Pacific War ⓘ island-hopping campaign ⓘ |
| precededBy | Gilbert and Marshall Islands campaign ⓘ |
| result |
Truk neutralized as major Japanese forward base
ⓘ
decisive American victory ⓘ destruction of Japanese base at Truk Lagoon ⓘ |
| startDate | 1944-02-17 ⓘ |
| strategicEffect |
contributed to isolation of Rabaul
ⓘ
reduced Japanese ability to project naval power in Central Pacific ⓘ |
| target |
Japanese Combined Fleet units at Truk
ⓘ
Japanese airfields at Truk ⓘ Japanese fuel and supply depots at Truk ⓘ |
| theater | Pacific Ocean ⓘ |
| typeOfAttack |
carrier-based air strike
ⓘ
surface ship bombardment ⓘ |
| year | 1944 ⓘ |
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: Operation Hailstone Description of subject: Operation Hailstone was a major U.S. Navy air and surface attack in February 1944 that devastated the Japanese naval and air base at Truk Lagoon in the Pacific Theater.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Operation Hailstone
linked to: Operation Hailstone