Operation 25
E126794
Operation 25 was the codename for Nazi Germany’s April 1941 military campaign that swiftly invaded and dismembered the Kingdom of Yugoslavia during World War II.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Operation 25 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1073850 — 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 25 Context triple: [German invasion of Yugoslavia, alsoKnownAs, Operation 25]
-
A.
Operation Z
Operation Z was the Imperial Japanese Navy’s codename for the 1941 carrier-based attack plan on Pearl Harbor that launched Japan into war with the United States in World War II.
-
B.
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.
-
C.
Operation Nekka
Operation Nekka was a 1933 Japanese Kwantung Army military campaign that led to the occupation of Rehe (Jehol) province and further consolidated Japan’s control over northern China.
-
D.
Operation Gothic Serpent
Operation Gothic Serpent was a 1993 U.S.-led special operations mission in Mogadishu, Somalia, aimed at capturing key lieutenants of warlord Mohamed Farrah Aidid, which culminated in the infamous Battle of Mogadishu.
-
E.
Operation Anadyr
Operation Anadyr was the secret Soviet military plan in 1962 to deploy nuclear missiles and other forces to Cuba, triggering the Cuban Missile Crisis.
- 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 25 Target entity description: Operation 25 was the codename for Nazi Germany’s April 1941 military campaign that swiftly invaded and dismembered the Kingdom of Yugoslavia during World War II.
-
A.
Operation Z
Operation Z was the Imperial Japanese Navy’s codename for the 1941 carrier-based attack plan on Pearl Harbor that launched Japan into war with the United States in World War II.
-
B.
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.
-
C.
Operation Nekka
Operation Nekka was a 1933 Japanese Kwantung Army military campaign that led to the occupation of Rehe (Jehol) province and further consolidated Japan’s control over northern China.
-
D.
Operation Gothic Serpent
Operation Gothic Serpent was a 1993 U.S.-led special operations mission in Mogadishu, Somalia, aimed at capturing key lieutenants of warlord Mohamed Farrah Aidid, which culminated in the infamous Battle of Mogadishu.
-
E.
Operation Anadyr
Operation Anadyr was the secret Soviet military plan in 1962 to deploy nuclear missiles and other forces to Cuba, triggering the Cuban Missile Crisis.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
German military campaign
ⓘ
military operation ⓘ |
| aimedAt | punishing Yugoslavia for leaving the Axis alignment ⓘ |
| alsoKnownAs | Unternehmen 25 ⓘ |
| belligerent |
Kingdom of Serbs, Croats and Slovenes
ⓘ
surface form:
Kingdom of Yugoslavia
Nazi Germany ⓘ |
| cause |
Yugoslav military coup of 27 March 1941
ⓘ
surface form:
Yugoslav coup d’état of March 27, 1941
|
| characteristic |
multi-front invasion
ⓘ
rapid campaign ⓘ |
| conflict |
German invasion of Yugoslavia
ⓘ
surface form:
Invasion of Yugoslavia
|
| consequence |
creation of Axis-aligned puppet states in former Yugoslav territory
ⓘ
dissolution of the Kingdom of Yugoslavia ⓘ |
| coordinatedWith |
Hungarian invasion of Yugoslavia
ⓘ
Italian invasion of Yugoslavia ⓘ |
| country | Nazi Germany ⓘ |
| followedBy |
Axis-occupied Yugoslavia
ⓘ
surface form:
Axis occupation of Yugoslavia
|
| hasPart | German invasion of Yugoslavia ⓘ |
| historicalPeriod | 1940s ⓘ |
| location |
Balkans
ⓘ
Kingdom of Serbs, Croats and Slovenes ⓘ
surface form:
Kingdom of Yugoslavia
|
| militaryBranch |
German Air Force
ⓘ
German Army ⓘ |
| notableFor |
dismemberment of Yugoslav territory by Axis powers
ⓘ
swift defeat of Yugoslav forces ⓘ |
| objective |
dismemberment of the Kingdom of Yugoslavia
ⓘ
invasion of Yugoslavia ⓘ |
| opponent |
Yugoslav Royal Air Force
ⓘ
surface form:
Royal Yugoslav Air Force
Royal Yugoslav Army ⓘ |
| participant |
German Army
ⓘ
Luftwaffe ⓘ Royal Yugoslav Army ⓘ Wehrmacht ⓘ |
| partOf |
Axis campaigns in the Balkans
ⓘ
World War II ⓘ |
| plannedBy |
Adolf Hitler
ⓘ
Wehrmacht High Command ⓘ
surface form:
German High Command
|
| precededBy | Tripartite Pact pressure on Yugoslavia ⓘ |
| relatedTo |
Balkan theatre of World War II
ⓘ
surface form:
Axis occupation of the Balkans
Italian invasion of Greece ⓘ
surface form:
Invasion of Greece
Operation Marita ⓘ |
| result |
Axis victory
ⓘ
defeat of the Kingdom of Yugoslavia ⓘ occupation of Yugoslavia by Axis powers ⓘ |
| startTime | April 1941 ⓘ |
| strategy | blitzkrieg ⓘ |
| theater | Balkan theatre of World War II ⓘ |
| timePeriod | April 6–17, 1941 ⓘ |
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 25 Description of subject: Operation 25 was the codename for Nazi Germany’s April 1941 military campaign that swiftly invaded and dismembered the Kingdom of Yugoslavia during World War II.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.