Operation Coronet
E50097
Operation Coronet was the planned Allied amphibious invasion of Japan’s main island of Honshu, scheduled for early 1946 as part of the broader strategy to force Japan’s surrender in World War II.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Operation Coronet canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T352042 — 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 Coronet Context triple: [Operation Downfall, subOperation, Operation Coronet]
-
A.
Operation Olympic
Operation Olympic was the planned Allied invasion of Japan’s southern island of Kyushu, intended as the first stage of a full-scale invasion that was ultimately rendered unnecessary by Japan’s surrender in 1945.
-
B.
Operation Garden
Operation Garden was the ground offensive component of the World War II Allied Operation Market Garden, in which British XXX Corps advanced north through the Netherlands to link up with airborne forces.
-
C.
Operation Avalanche
Operation Avalanche was the Allied amphibious invasion of mainland Italy at Salerno in September 1943, a key campaign that led to the downfall of Mussolini’s regime and opened a new front against Nazi Germany in Europe.
-
D.
Operation Iceberg
Operation Iceberg was the codename for the Allied amphibious assault and ensuing campaign to capture the Japanese island of Okinawa during World War II.
-
E.
Operation Cobra
Operation Cobra was a major Allied offensive launched by U.S. forces in July 1944 to break out of the Normandy beachhead and rapidly advance across German-occupied France.
- 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 Coronet Target entity description: Operation Coronet was the planned Allied amphibious invasion of Japan’s main island of Honshu, scheduled for early 1946 as part of the broader strategy to force Japan’s surrender in World War II.
-
A.
Operation Olympic
Operation Olympic was the planned Allied invasion of Japan’s southern island of Kyushu, intended as the first stage of a full-scale invasion that was ultimately rendered unnecessary by Japan’s surrender in 1945.
-
B.
Operation Garden
Operation Garden was the ground offensive component of the World War II Allied Operation Market Garden, in which British XXX Corps advanced north through the Netherlands to link up with airborne forces.
-
C.
Operation Avalanche
Operation Avalanche was the Allied amphibious invasion of mainland Italy at Salerno in September 1943, a key campaign that led to the downfall of Mussolini’s regime and opened a new front against Nazi Germany in Europe.
-
D.
Operation Iceberg
Operation Iceberg was the codename for the Allied amphibious assault and ensuing campaign to capture the Japanese island of Okinawa during World War II.
-
E.
Operation Cobra
Operation Cobra was a major Allied offensive launched by U.S. forces in July 1944 to break out of the Normandy beachhead and rapidly advance across German-occupied France.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
planned amphibious invasion
ⓘ
planned military operation ⓘ |
| aimedAt | direct assault on Tokyo Plain ⓘ |
| alsoKnownAs | Invasion of the Kanto Plain (planned) ⓘ |
| codenameOf | invasion of Honshu ⓘ |
| conflict | World War II ⓘ |
| country |
Australia
ⓘ
Canada ⓘ United Kingdom ⓘ United States of America ⓘ
surface form:
United States
|
| historicalPeriod | 1940s ⓘ |
| location |
Honshu
ⓘ
Kantō region ⓘ
surface form:
Kantō Plain
Tokyo metropolitan area ⓘ
surface form:
Tokyo region
|
| objective |
capture Tokyo region
ⓘ
force Japan’s surrender ⓘ |
| partOf |
Allied operations in the Pacific Theater
ⓘ
Operation Downfall ⓘ planned invasion of Japan ⓘ |
| plannedAlliedParticipants |
Commonwealth ground forces
ⓘ
Royal Navy ⓘ United States Army ⓘ United States Marine Corps ⓘ United States Navy ⓘ |
| plannedCasualtyExpectations | very high on both sides ⓘ |
| plannedCommandStructure |
U.S. Army Pacific
ⓘ
surface form:
U.S. Army Forces, Pacific
U.S. Pacific Fleet ⓘ
surface form:
U.S. Navy Pacific Fleet
|
| plannedDate |
1946-03
ⓘ
early 1946 ⓘ |
| plannedFollowUpTo | seizure of Kyushu in Operation Olympic ⓘ |
| plannedForceType |
airborne forces
ⓘ
amphibious forces ⓘ ground forces ⓘ naval forces ⓘ |
| plannedLandingArea |
Kujūkuri Beach
ⓘ
Sagami Bay ⓘ |
| plannedOpposingForce |
Imperial Japanese Army
ⓘ
Imperial Japanese Navy ⓘ |
| plannedScale | one of the largest amphibious operations ever conceived ⓘ |
| precededBy | Operation Olympic ⓘ |
| reasonForCancellation |
Japanese surrender after atomic bombings
ⓘ
Soviet declaration of war on Japan ⓘ |
| relatedTo |
Japanese Instrument of Surrender
ⓘ
atomic bombings of Hiroshima and Nagasaki ⓘ |
| status | cancelled ⓘ |
| theater |
Pacific War
ⓘ
surface form:
Pacific Theater of World War II
|
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 Coronet Description of subject: Operation Coronet was the planned Allied amphibious invasion of Japan’s main island of Honshu, scheduled for early 1946 as part of the broader strategy to force Japan’s surrender in World War II.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.