atomic bombings of Hiroshima and Nagasaki
E17555
The atomic bombings of Hiroshima and Nagasaki were the first and only wartime uses of nuclear weapons, carried out by the United States against Japan in August 1945 and leading to immense destruction and Japan’s subsequent surrender in World War II.
All labels observed (6)
How this entity was disambiguated
This entity first appeared as the object of triple T134128 — 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.
Target entity: atomic bombings of Hiroshima and Nagasaki Context triple: [Trinity test site, New Mexico, relatedEvent, atomic bombings of Hiroshima and Nagasaki]
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A.
atomic bombing of Hiroshima
The atomic bombing of Hiroshima was the first use of a nuclear weapon in war, when the United States dropped an atomic bomb on the Japanese city of Hiroshima on August 6, 1945, causing massive destruction and loss of life.
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B.
atomic bombing of Nagasaki
The atomic bombing of Nagasaki was the second nuclear attack carried out by the United States against Japan in August 1945, leading to massive civilian casualties and contributing to Japan’s surrender in World War II.
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C.
Allied strategic bombing of Japan
Allied strategic bombing of Japan was the World War II air campaign in which U.S. and Allied forces conducted extensive conventional and atomic bombing raids against Japanese cities and industrial targets to cripple Japan’s war-making capacity and force its surrender.
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D.
Operation Crossroads
Operation Crossroads was a series of U.S. nuclear weapons tests conducted at Bikini Atoll in 1946 to study the effects of atomic bombs on warships and military equipment.
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E.
attack on Pearl Harbor
The attack on Pearl Harbor was the surprise Japanese military strike on the U.S. naval base in Hawaii on December 7, 1941, that led to the United States’ entry into World War II.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: atomic bombings of Hiroshima and Nagasaki Target entity description: The atomic bombings of Hiroshima and Nagasaki were the first and only wartime uses of nuclear weapons, carried out by the United States against Japan in August 1945 and leading to immense destruction and Japan’s subsequent surrender in World War II.
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A.
atomic bombing of Hiroshima
The atomic bombing of Hiroshima was the first use of a nuclear weapon in war, when the United States dropped an atomic bomb on the Japanese city of Hiroshima on August 6, 1945, causing massive destruction and loss of life.
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B.
atomic bombing of Nagasaki
The atomic bombing of Nagasaki was the second nuclear attack carried out by the United States against Japan in August 1945, leading to massive civilian casualties and contributing to Japan’s surrender in World War II.
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C.
Allied strategic bombing of Japan
Allied strategic bombing of Japan was the World War II air campaign in which U.S. and Allied forces conducted extensive conventional and atomic bombing raids against Japanese cities and industrial targets to cripple Japan’s war-making capacity and force its surrender.
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D.
Operation Crossroads
Operation Crossroads was a series of U.S. nuclear weapons tests conducted at Bikini Atoll in 1946 to study the effects of atomic bombs on warships and military equipment.
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E.
attack on Pearl Harbor
The attack on Pearl Harbor was the surprise Japanese military strike on the U.S. naval base in Hawaii on December 7, 1941, that led to the United States’ entry into World War II.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
military operation
ⓘ
strategic bombing ⓘ use of nuclear weapons in warfare ⓘ |
| aftermath |
Allied occupation of Japan
ⓘ
Japanese Instrument of Surrender ⓘ establishment of Hiroshima Peace Memorial ⓘ establishment of Nagasaki Atomic Bomb Museum ⓘ |
| aim | to force Japan’s unconditional surrender ⓘ |
| aircraftUsed | B-29 Superfortress ⓘ |
| aircraftUsedAtHiroshima | Enola Gay ⓘ |
| aircraftUsedAtNagasaki | Bockscar ⓘ |
| belligerent |
Japan
ⓘ
surface form:
Empire of Japan
United States of America ⓘ
surface form:
United States
|
| casualtiesEstimate |
over 100000 immediate deaths
ⓘ
over 200000 deaths by the end of 1945 ⓘ |
| commemoratedOn |
Hiroshima Peace Memorial Day
ⓘ
Nagasaki Peace Memorial Day ⓘ |
| conductedBy | United States Army Air Forces ⓘ |
| conflict | World War II ⓘ |
| controversy |
ethical debate over targeting cities
ⓘ
historical debate over necessity ⓘ |
| countryTargeted | Japan ⓘ |
| date |
1945-08-06
ⓘ
1945-08-09 ⓘ |
| historicalSignificance |
first use of nuclear weapons in war
ⓘ
only wartime use of nuclear weapons to date ⓘ |
| influenced |
development of Cold War nuclear deterrence doctrines
ⓘ
global nuclear non-proliferation movement ⓘ |
| justificationClaimedByUS | to avoid invasion of Japan ⓘ |
| location |
Hiroshima
ⓘ
Nagasaki ⓘ |
| longTermEffects |
genetic damage concerns
ⓘ
increased cancer rates ⓘ radiation sickness ⓘ |
| orderedBy |
President Harry S. Truman
ⓘ
surface form:
Harry S. Truman
|
| partOf |
Allied strategic bombing of Japan
ⓘ
Pacific War ⓘ |
| projectContext | Manhattan Project ⓘ |
| result |
Japanese surrender
ⓘ
end of World War II in Asia ⓘ mass civilian casualties ⓘ widespread destruction of urban areas ⓘ |
| targetCountryGovernment |
Government of Japan
ⓘ
surface form:
Imperial Japanese government
|
| timePeriod | August 1945 ⓘ |
| weaponTechnology | nuclear fission ⓘ |
| weaponType | atomic bomb ⓘ |
| weaponUsedAtHiroshima | Little Boy ⓘ |
| weaponUsedAtNagasaki | Fat Man ⓘ |
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.
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.
Subject: atomic bombings of Hiroshima and Nagasaki Description of subject: The atomic bombings of Hiroshima and Nagasaki were the first and only wartime uses of nuclear weapons, carried out by the United States against Japan in August 1945 and leading to immense destruction and Japan’s subsequent surrender in World War II.
Referenced by (25)
Full triples — surface form annotated when it differs from this entity's canonical label.