Operation Ivy

E290399

United States nuclear weapons test nuclear test nuclear test series thermonuclear test

Operation Ivy was a 1952 U.S. nuclear test series in the Pacific that included the first successful full-scale thermonuclear (hydrogen bomb) detonation.

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All labels observed (1)

Label	Occurrences
Operation Ivy canonical	10

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.

Enewetak Atoll → testSeriesConducted → Operation Ivy ⓘ

United States nuclear weapons testing → hasPart → Operation Ivy ⓘ

Operation Ivy → partOf → Operation Ivy self-linksurface differs ⓘ

subject surface form: Ivy Mike

Operation Castle → precededBy → Operation Ivy ⓘ

Runit Dome → associatedWith → Operation Ivy ⓘ

Ivy Mike → partOf → Operation Ivy ⓘ

Ivy Mike → testSeries → Operation Ivy ⓘ

Pacific Proving Grounds → notableEvent → Operation Ivy ⓘ

Operation Tumbler–Snapper → followedBy → Operation Ivy ⓘ

Operation Upshot–Knothole → precededBy → Operation Ivy ⓘ