Operation Sandstone
E290398
Operation Sandstone was a 1948 series of U.S. nuclear weapons tests in the Pacific that focused on improving bomb design and efficiency.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Operation Sandstone canonical | 7 |
How this entity was disambiguated
This entity first appeared as the object of triple T2710368 — 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 Sandstone Context triple: [Enewetak Atoll, testSeriesConducted, Operation Sandstone]
-
A.
Operation Grenade
Operation Grenade was a World War II Allied offensive in early 1945 in which U.S. forces crossed the Roer River to help encircle German troops west of the Rhine.
-
B.
Operation Jericho
Operation Jericho was a daring low-level Allied air raid in 1944 targeting Amiens Prison in German-occupied France to breach its walls and free Resistance prisoners.
-
C.
Operation Granby
Operation Granby was the codename for the United Kingdom’s military campaign during the 1990–1991 Gulf War against Iraq.
-
D.
Operation Crossbow
Operation Crossbow was a World War II Allied campaign of intelligence, bombing, and reconnaissance aimed at locating and destroying German V-weapon (V-1 and V-2) research, production, and launch sites.
-
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 Sandstone Target entity description: Operation Sandstone was a 1948 series of U.S. nuclear weapons tests in the Pacific that focused on improving bomb design and efficiency.
-
A.
Operation Grenade
Operation Grenade was a World War II Allied offensive in early 1945 in which U.S. forces crossed the Roer River to help encircle German troops west of the Rhine.
-
B.
Operation Jericho
Operation Jericho was a daring low-level Allied air raid in 1944 targeting Amiens Prison in German-occupied France to breach its walls and free Resistance prisoners.
-
C.
Operation Granby
Operation Granby was the codename for the United Kingdom’s military campaign during the 1990–1991 Gulf War against Iraq.
-
D.
Operation Crossbow
Operation Crossbow was a World War II Allied campaign of intelligence, bombing, and reconnaissance aimed at locating and destroying German V-weapon (V-1 and V-2) research, production, and launch sites.
-
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 (45)
| Predicate | Object |
|---|---|
| instanceOf |
United States military operation
ⓘ
series of nuclear weapons tests ⓘ |
| codenameSeries | Sandstone ⓘ |
| conductedBy | Los Alamos Laboratory ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| detonationMedium | atmosphere ⓘ |
| endDate | 1948-05-15 ⓘ |
| era | early Cold War ⓘ |
| focus |
composite plutonium–uranium cores
ⓘ
implosion-type fission weapons ⓘ |
| followedBy | Operation Ranger ⓘ |
| follows | Operation Crossroads ⓘ |
| impact |
accelerated U.S. nuclear stockpile growth
ⓘ
influenced subsequent U.S. nuclear test series ⓘ |
| legalStatusAtTime | conducted before Limited Test Ban Treaty ⓘ |
| location |
Enewetak Atoll
ⓘ
Marshall Islands ⓘ |
| militaryBranchInvolved |
United States Air Force
ⓘ
United States Army ⓘ United States Navy ⓘ |
| numberOfTests | 3 ⓘ |
| operator |
United States Atomic Energy Commission
ⓘ
United States Department of Defense ⓘ
linked to:
Department of Defense
|
| partOf |
United States nuclear weapons testing program
ⓘ
linked to:
United States nuclear weapons testing
|
| purpose |
evaluate new core and tamper configurations
ⓘ
improve nuclear bomb design ⓘ increase nuclear weapon efficiency ⓘ |
| region |
North Pacific Ocean
ⓘ
linked to:
Northern Pacific Ocean
|
| relatedTo |
Manhattan Project
ⓘ
Operation Greenhouse ⓘ nuclear weapons development ⓘ |
| result |
enabled more efficient use of fissile material
ⓘ
led to lighter and more powerful nuclear weapons ⓘ validated new weapon designs for stockpiling ⓘ |
| safetyConcern | radioactive fallout ⓘ |
| startDate | 1948-04-15 ⓘ |
| testEnvironment | Pacific Proving Grounds ⓘ |
| testName |
X-Ray
ⓘ
Yoke ⓘ Zebra ⓘ
linked to:
zebra
|
| testSite |
Enewetak Proving Ground
ⓘ
linked to:
Pacific Proving Grounds
|
| testType |
atmospheric nuclear test
ⓘ
tower shot ⓘ |
| testYieldRange | kiloton range ⓘ |
| year | 1948 ⓘ |
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 Sandstone Description of subject: Operation Sandstone was a 1948 series of U.S. nuclear weapons tests in the Pacific that focused on improving bomb design and efficiency.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.