IS-2 heavy tank
E712411
The IS-2 was a late-World War II Soviet heavy tank known for its powerful 122 mm gun and thick armor, designed to break through German defenses and engage enemy heavy tanks.
All labels observed (3)
| Label | Occurrences |
|---|---|
| IS series heavy tanks | 2 |
| IS-2 heavy tank canonical | 1 |
| Iosif Stalin tanks | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8049888 — 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: IS-2 heavy tank Context triple: [Soviet Armed Forces in World War II, notableWeapon, IS-2 heavy tank]
-
A.
KV-1 heavy tank
The KV-1 heavy tank was a Soviet World War II armored vehicle noted for its exceptionally thick armor and significant role in early Eastern Front battles.
-
B.
T-34 medium tank
The T-34 medium tank was a highly influential Soviet World War II armored fighting vehicle renowned for its balance of firepower, protection, and mobility, and is often credited with playing a decisive role on the Eastern Front.
-
C.
SU-100 self-propelled gun
The SU-100 self-propelled gun was a Soviet World War II tank destroyer armed with a powerful 100 mm gun and built on the chassis of the T-34 medium tank.
-
D.
T-44 medium tank
The T-44 medium tank was a late-World War II Soviet armored fighting vehicle that improved upon the T-34’s design with better armor, a lower profile, and enhanced mobility, serving as a key step toward the later T-54/55 series.
-
E.
Panther tank
The Panther tank was a German World War II medium tank renowned for its powerful gun, sloped armor, and balance of firepower and mobility, making it one of the most formidable armored vehicles of the war.
- 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: IS-2 heavy tank Target entity description: The IS-2 was a late-World War II Soviet heavy tank known for its powerful 122 mm gun and thick armor, designed to break through German defenses and engage enemy heavy tanks.
-
A.
KV-1 heavy tank
The KV-1 heavy tank was a Soviet World War II armored vehicle noted for its exceptionally thick armor and significant role in early Eastern Front battles.
-
B.
T-34 medium tank
The T-34 medium tank was a highly influential Soviet World War II armored fighting vehicle renowned for its balance of firepower, protection, and mobility, and is often credited with playing a decisive role on the Eastern Front.
-
C.
SU-100 self-propelled gun
The SU-100 self-propelled gun was a Soviet World War II tank destroyer armed with a powerful 100 mm gun and built on the chassis of the T-34 medium tank.
-
D.
T-44 medium tank
The T-44 medium tank was a late-World War II Soviet armored fighting vehicle that improved upon the T-34’s design with better armor, a lower profile, and enhanced mobility, serving as a key step toward the later T-54/55 series.
-
E.
Panther tank
The Panther tank was a German World War II medium tank renowned for its powerful gun, sloped armor, and balance of firepower and mobility, making it one of the most formidable armored vehicles of the war.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Soviet heavy tank
ⓘ
World War II tank ⓘ |
| armorType | cast and welded steel armor ⓘ |
| caliberOfMainGun | 122 mm ⓘ |
| category | armored fighting vehicle ⓘ |
| conflict | World War II ⓘ |
| countryOfOrigin | Soviet Union ⓘ |
| crew |
4
ⓘ
4 men ⓘ |
| designedAs | breakthrough tank ⓘ |
| designedBy | Soviet tank design bureaus ⓘ |
| designedTo |
break through fortified defenses
ⓘ
defeat German heavy tanks ⓘ |
| developedFrom | IS-1 heavy tank NERFINISHED ⓘ |
| enginePower | about 600 hp ⓘ |
| engineType | V-2-IS V12 diesel engine ⓘ |
| era | late World War II ⓘ |
| gunType | D-25T 122 mm tank gun ⓘ |
| hullFrontArmorThickness | up to about 120 mm ⓘ |
| introducedAsImprovementOver | KV series heavy tanks NERFINISHED ⓘ |
| mainArmament | 122 mm D-25T gun ⓘ |
| maximumRoadSpeed | about 37 km/h ⓘ |
| namedAfter | Joseph Stalin NERFINISHED ⓘ |
| notableFeature |
large, rounded turret
ⓘ
sloped frontal hull armor ⓘ two-piece 122 mm ammunition ⓘ |
| partOfSeries | IS tank family NERFINISHED ⓘ |
| postwarUse | Cold War period ⓘ |
| predecessor | KV-1 heavy tank NERFINISHED ⓘ |
| propulsion | diesel engine ⓘ |
| replacedBy |
IS-3 heavy tank
NERFINISHED
ⓘ
T-10 heavy tank NERFINISHED ⓘ |
| role | breakthrough and assault tank ⓘ |
| sawActionIn |
Battle of Berlin
NERFINISHED
ⓘ
Eastern Front NERFINISHED ⓘ Vistula–Oder Offensive NERFINISHED ⓘ |
| secondaryArmament |
12.7 mm DShK machine gun
ⓘ
7.62 mm DT machine gun ⓘ |
| serviceEntry | 1944 ⓘ |
| suspension | torsion bar ⓘ |
| turretFrontArmorThickness | up to about 100–120 mm ⓘ |
| usedBy |
Korean People's Army
NERFINISHED
ⓘ
People's Liberation Army NERFINISHED ⓘ Polish People's Army NERFINISHED ⓘ Red Army NERFINISHED ⓘ Soviet Army NERFINISHED ⓘ |
| variant |
IS-2 model 1943
NERFINISHED
ⓘ
IS-2 model 1944 ⓘ |
| weight | around 46 tonnes ⓘ |
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: IS-2 heavy tank Description of subject: The IS-2 was a late-World War II Soviet heavy tank known for its powerful 122 mm gun and thick armor, designed to break through German defenses and engage enemy heavy tanks.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
IS series heavy tanks
this entity surface form:
IS series heavy tanks
this entity surface form:
Iosif Stalin tanks