Operation Ajax
E503947
Operation Ajax was the covert Anglo-American operation that orchestrated the 1953 coup d'état overthrowing Iran’s democratically elected Prime Minister Mohammad Mossadegh and strengthening the rule of Shah Mohammad Reza Pahlavi.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Operation Ajax canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T5215812 — 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 Ajax Context triple: [1953 Iranian coup d'état, alsoKnownAs, Operation Ajax]
-
A.
Operation Fustian
Operation Fustian was a World War II Allied airborne assault in July 1943 aimed at capturing the Primosole Bridge in Sicily during the Allied invasion of the island.
-
B.
Operation Ariel
Operation Ariel was the World War II British evacuation of Allied troops and civilians from western France in June 1940, following the Dunkirk evacuation.
-
C.
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.
-
D.
Operation Fulcrum
Operation Fulcrum was a U.S. nuclear weapons test series conducted as part of the broader American nuclear testing program during the Cold War.
-
E.
Operation Diadem
Operation Diadem was a major Allied offensive in Italy during World War II aimed at breaking the German Gustav Line and enabling the liberation of Rome.
- 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 Ajax Target entity description: Operation Ajax was the covert Anglo-American operation that orchestrated the 1953 coup d'état overthrowing Iran’s democratically elected Prime Minister Mohammad Mossadegh and strengthening the rule of Shah Mohammad Reza Pahlavi.
-
A.
Operation Fustian
Operation Fustian was a World War II Allied airborne assault in July 1943 aimed at capturing the Primosole Bridge in Sicily during the Allied invasion of the island.
-
B.
Operation Ariel
Operation Ariel was the World War II British evacuation of Allied troops and civilians from western France in June 1940, following the Dunkirk evacuation.
-
C.
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.
-
D.
Operation Fulcrum
Operation Fulcrum was a U.S. nuclear weapons test series conducted as part of the broader American nuclear testing program during the Cold War.
-
E.
Operation Diadem
Operation Diadem was a major Allied offensive in Italy during World War II aimed at breaking the German Gustav Line and enabling the liberation of Rome.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Central Intelligence Agency operation
ⓘ
MI6 operation ⓘ coup d'état ⓘ covert operation ⓘ |
| alsoKnownAs |
1953 Iranian coup d'état
NERFINISHED
ⓘ
TP-Ajax NERFINISHED ⓘ |
| cause |
delegitimization of the Pahlavi monarchy
ⓘ
deterioration of Iran–United States relations ⓘ long-term anti-American sentiment in Iran ⓘ |
| countryInvolved |
United Kingdom
ⓘ
United States of America ⓘ
surface form:
United States
|
| date | 1953 ⓘ |
| documentedIn | declassified CIA documents ⓘ |
| endDate | 1953-08-19 ⓘ |
| executedBy |
Central Intelligence Agency
NERFINISHED
ⓘ
Kermit Roosevelt Jr. NERFINISHED ⓘ MI6 NERFINISHED ⓘ |
| installed | Fazlollah Zahedi as Prime Minister of Iran NERFINISHED ⓘ |
| involvedOrganization |
Anglo-Iranian Oil Company
NERFINISHED
ⓘ
U.S. Department of State NERFINISHED ⓘ |
| involvedPerson |
Allen Dulles
NERFINISHED
ⓘ
Fazlollah Zahedi NERFINISHED ⓘ John Foster Dulles NERFINISHED ⓘ Kermit Roosevelt Jr. NERFINISHED ⓘ Mohammad Mossadegh NERFINISHED ⓘ Mohammad Reza Pahlavi NERFINISHED ⓘ |
| legalStatus | widely regarded as a violation of Iranian sovereignty ⓘ |
| location |
Iran
NERFINISHED
ⓘ
Tehran NERFINISHED ⓘ |
| method |
bribery of politicians
ⓘ
influence over military officers ⓘ organization of street protests ⓘ propaganda campaign ⓘ |
| motive |
containment of Soviet influence
ⓘ
control of Iranian oil resources ⓘ protection of Western economic interests in Iran ⓘ |
| partOf | Cold War ⓘ |
| plannedBy |
Central Intelligence Agency
NERFINISHED
ⓘ
MI6 NERFINISHED ⓘ |
| pretext | alleged communist threat in Iran ⓘ |
| relatedTo | Iranian Revolution NERFINISHED ⓘ |
| result |
consolidation of monarchical power in Iran
ⓘ
overthrow of Mohammad Mossadegh ⓘ restoration of the Shah's absolute authority ⓘ strengthening of Shah Mohammad Reza Pahlavi's rule ⓘ |
| startDate | 1953-08-15 ⓘ |
| supportedBy | Shah Mohammad Reza Pahlavi NERFINISHED ⓘ |
| target | Mohammad Mossadegh NERFINISHED ⓘ |
| yearOfDeclassification | 2013 ⓘ |
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 Ajax Description of subject: Operation Ajax was the covert Anglo-American operation that orchestrated the 1953 coup d'état overthrowing Iran’s democratically elected Prime Minister Mohammad Mossadegh and strengthening the rule of Shah Mohammad Reza Pahlavi.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.