Battle of the Crater
E190777
The Battle of the Crater was a notable and disastrous 1864 Union assault during the American Civil War, in which an underground mine explosion before Petersburg, Virginia, led to heavy Union casualties and a failed breakthrough.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Battle of the Crater canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T1192937 — 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: Battle of the Crater Context triple: [Siege of Petersburg, majorEngagement, Battle of the Crater]
-
A.
Battle of Cold Harbor
The Battle of Cold Harbor was a major and notoriously bloody 1864 Civil War engagement near Richmond, Virginia, in which Confederate forces under Robert E. Lee repelled repeated Union assaults during Ulysses S. Grant’s Overland Campaign.
-
B.
Battle of Big Black River Bridge
The Battle of Big Black River Bridge was an American Civil War engagement in May 1863 in Mississippi, where Union forces under Ulysses S. Grant defeated Confederate troops, forcing them back into Vicksburg and setting the stage for the subsequent siege.
-
C.
Battle of Port Hudson
The Battle of Port Hudson was a major American Civil War siege in Louisiana where Union forces sought to secure control of the Mississippi River by capturing a key Confederate stronghold.
-
D.
Battle of Kennesaw Mountain
The Battle of Kennesaw Mountain was a major American Civil War engagement in 1864 near Marietta, Georgia, during the Atlanta Campaign, in which Union forces under William T. Sherman attacked entrenched Confederate troops commanded by Joseph E. Johnston.
-
E.
Pickett’s Charge
Pickett’s Charge was a massive, ill-fated Confederate infantry assault on the third day of the Battle of Gettysburg that marked a turning point against the Confederacy in the American Civil 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: Battle of the Crater Target entity description: The Battle of the Crater was a notable and disastrous 1864 Union assault during the American Civil War, in which an underground mine explosion before Petersburg, Virginia, led to heavy Union casualties and a failed breakthrough.
-
A.
Battle of Cold Harbor
The Battle of Cold Harbor was a major and notoriously bloody 1864 Civil War engagement near Richmond, Virginia, in which Confederate forces under Robert E. Lee repelled repeated Union assaults during Ulysses S. Grant’s Overland Campaign.
-
B.
Battle of Big Black River Bridge
The Battle of Big Black River Bridge was an American Civil War engagement in May 1863 in Mississippi, where Union forces under Ulysses S. Grant defeated Confederate troops, forcing them back into Vicksburg and setting the stage for the subsequent siege.
-
C.
Battle of Port Hudson
The Battle of Port Hudson was a major American Civil War siege in Louisiana where Union forces sought to secure control of the Mississippi River by capturing a key Confederate stronghold.
-
D.
Battle of Kennesaw Mountain
The Battle of Kennesaw Mountain was a major American Civil War engagement in 1864 near Marietta, Georgia, during the Atlanta Campaign, in which Union forces under William T. Sherman attacked entrenched Confederate troops commanded by Joseph E. Johnston.
-
E.
Pickett’s Charge
Pickett’s Charge was a massive, ill-fated Confederate infantry assault on the third day of the Battle of Gettysburg that marked a turning point against the Confederacy in the American Civil War.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
battle
ⓘ
engagement ⓘ event in the American Civil War ⓘ |
| alsoKnownAs | Crater ⓘ |
| associatedWith |
Petersburg National Battlefield
ⓘ
surface form:
Petersburg National Battlefield (modern historic site)
|
| belligerent |
Confederate States of America
ⓘ
surface form:
Confederacy
Union ⓘ |
| casualtiesConfederate | significant but lower than Union ⓘ |
| casualtiesUnion | heavy ⓘ |
| cause | Union attempt to break Confederate lines at Petersburg ⓘ |
| commander |
Major General Ambrose E. Burnside
ⓘ
surface form:
Ambrose E. Burnside
George G. Meade ⓘ Robert E. Lee ⓘ Ulysses S. Grant ⓘ William Mahone ⓘ |
| conflict | American Civil War ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| date | July 30, 1864 ⓘ |
| description |
Union assault troops became trapped in the crater and suffered heavy casualties
ⓘ
Union troops detonated a mine beneath Confederate lines creating a massive crater ⓘ |
| followedBy | continued trench warfare around Petersburg ⓘ |
| front |
Richmond–Petersburg Campaign
ⓘ
surface form:
Richmond–Petersburg front
|
| geographicalFeature | large crater created by explosion in Confederate lines ⓘ |
| historicalPeriod | American Civil War era ⓘ |
| location | Petersburg, Virginia ⓘ |
| militaryBranchInvolved |
Confederate States Army
ⓘ
surface form:
Confederate Army
Union Army ⓘ |
| notableUnit |
Army of Northern Virginia
ⓘ
Army of the Potomac ⓘ IX Corps (Union Army) ⓘ United States Colored Troops ⓘ XVIII Corps (Union Army) ⓘ |
| operationType | assault following underground mine explosion ⓘ |
| opposedBy |
Army of Northern Virginia
ⓘ
surface form:
Confederate Army of Northern Virginia
|
| partOf |
Overland Campaign
ⓘ
surface form:
Overland Campaign and Richmond–Petersburg Campaign
Siege of Petersburg ⓘ |
| plannedBy | Union engineers and IX Corps officers ⓘ |
| precededBy | initial stages of the Siege of Petersburg ⓘ |
| result |
Confederate victory
ⓘ
failed Union breakthrough attempt ⓘ |
| significance |
noted for mismanagement of Union attack plans
ⓘ
noted for the role and subsequent withdrawal of trained United States Colored Troops from the lead assault ⓘ one of the most infamous failed Union assaults of the Civil War ⓘ |
| strategicOutcome | no significant change in the Petersburg siege lines ⓘ |
| tacticUsed |
detonation of large underground explosive charge
ⓘ
military mining ⓘ |
| theater | Eastern Theater of the American Civil War ⓘ |
| year | 1864 ⓘ |
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: Battle of the Crater Description of subject: The Battle of the Crater was a notable and disastrous 1864 Union assault during the American Civil War, in which an underground mine explosion before Petersburg, Virginia, led to heavy Union casualties and a failed breakthrough.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Ambrose E. Burnside