Operation Ivy
E290399
Operation Ivy was a 1952 U.S. nuclear test series in the Pacific that included the first successful full-scale thermonuclear (hydrogen bomb) detonation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Operation Ivy canonical | 10 |
How this entity was disambiguated
This entity first appeared as the object of triple T2710370 — 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 Ivy Context triple: [Enewetak Atoll, testSeriesConducted, Operation Ivy]
-
A.
Operation Vulcan
Operation Vulcan was a late-World War II Allied offensive in Tunisia aimed at breaking the remaining Axis resistance and securing North Africa.
-
B.
Operation VICTOR V
Operation VICTOR V was the U.S. military campaign in World War II aimed at liberating the island of Mindanao in the Philippines from Japanese occupation.
-
C.
Operation Thunderbolt
Operation Thunderbolt was the 1976 Israeli commando raid on Entebbe Airport in Uganda to rescue hostages from a hijacked Air France flight.
-
D.
Operation Galvanic
Operation Galvanic was the U.S. amphibious offensive in November 1943 that launched the Gilbert Islands campaign in the central Pacific, including the bloody Battle of Tarawa, during World War II.
-
E.
Operation Whirlwind
Operation Whirlwind was the codename for the large-scale Soviet military intervention that crushed the Hungarian Revolution of 1956 and reasserted Soviet control over Hungary.
- 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 Ivy Target entity description: Operation Ivy was a 1952 U.S. nuclear test series in the Pacific that included the first successful full-scale thermonuclear (hydrogen bomb) detonation.
-
A.
Operation Vulcan
Operation Vulcan was a late-World War II Allied offensive in Tunisia aimed at breaking the remaining Axis resistance and securing North Africa.
-
B.
Operation VICTOR V
Operation VICTOR V was the U.S. military campaign in World War II aimed at liberating the island of Mindanao in the Philippines from Japanese occupation.
-
C.
Operation Thunderbolt
Operation Thunderbolt was the 1976 Israeli commando raid on Entebbe Airport in Uganda to rescue hostages from a hijacked Air France flight.
-
D.
Operation Galvanic
Operation Galvanic was the U.S. amphibious offensive in November 1943 that launched the Gilbert Islands campaign in the central Pacific, including the bloody Battle of Tarawa, during World War II.
-
E.
Operation Whirlwind
Operation Whirlwind was the codename for the large-scale Soviet military intervention that crushed the Hungarian Revolution of 1956 and reasserted Soviet control over Hungary.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
United States nuclear weapons test
ⓘ
nuclear test ⓘ nuclear test series ⓘ thermonuclear test ⓘ |
| codename | Ivy ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| deviceType |
cryogenic liquid deuterium-fueled thermonuclear device
ⓘ
pure fission bomb ⓘ |
| effect | vaporized the test island of Elugelab ⓘ |
| endDate | 1952-11-16 ⓘ |
| historicalSignificance | marked beginning of the megaton-class hydrogen bomb era ⓘ |
| impact | accelerated U.S. thermonuclear weapons deployment ⓘ |
| includesTest |
Ivy King
ⓘ
Ivy Mike ⓘ |
| location |
Enewetak Atoll
ⓘ
Marshall Islands ⓘ |
| notableFor |
first full-scale test of a staged hydrogen bomb
ⓘ
first successful full-scale thermonuclear weapon test ⓘ largest pure fission device ever tested by the United States ⓘ |
| numberOfTests | 2 ⓘ |
| operator |
United States Atomic Energy Commission
ⓘ
Department of Defense ⓘ
surface form:
United States Department of Defense
|
| partOf |
Operation Ivy
self-linksurface differs
ⓘ
United States nuclear weapons testing ⓘ
surface form:
United States nuclear testing program
|
| predecessor | Operation Tumbler–Snapper ⓘ |
| purpose |
thermonuclear weapon development
ⓘ
weapons effects study ⓘ |
| result | demonstrated feasibility of staged thermonuclear weapons ⓘ |
| startDate | 1952-11-01 ⓘ |
| successor | Operation Upshot–Knothole ⓘ |
| testDate |
1952-11-01
ⓘ
1952-11-16 ⓘ |
| testSite |
Pacific Proving Grounds
ⓘ
surface form:
Enewetak Proving Ground
|
| testType |
atmospheric nuclear test
ⓘ
surface burst ⓘ tower shot ⓘ |
| theaterOfOperations | Pacific Proving Grounds ⓘ |
| year | 1952 ⓘ |
| yield | about 10.4 megatons of TNT ⓘ |
| yieldRange | megaton ⓘ |
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 Ivy Description of subject: Operation Ivy was a 1952 U.S. nuclear test series in the Pacific that included the first successful full-scale thermonuclear (hydrogen bomb) detonation.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Ivy Mike