Fourth Battle of Petersburg
E719750
The Fourth Battle of Petersburg was a late March 1865 Union offensive during the American Civil War that helped break Confederate defensive lines around Petersburg, Virginia, paving the way for the fall of Richmond and the war’s end.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Fourth Battle of Petersburg canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8125479 — 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: Fourth Battle of Petersburg Context triple: [Second Battle of Petersburg, followedBy, Fourth Battle of Petersburg]
-
A.
Third Battle of Petersburg
The Third Battle of Petersburg was the decisive Union assault in April 1865 that broke Confederate defenses around Petersburg, leading directly to the fall of Richmond and the endgame of the American Civil War.
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B.
Second Battle of Petersburg
The Second Battle of Petersburg was a key June 1864 American Civil War clash in Virginia in which failed Union assaults against Confederate defenses led directly to the prolonged Siege of Petersburg.
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C.
Siege of Petersburg
The Siege of Petersburg was a prolonged series of trench warfare operations in 1864–1865 around Petersburg, Virginia, whose eventual Union victory cut off Confederate supply lines and led directly to the fall of Richmond and the end of the American Civil War.
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D.
Battle of Five Forks
The Battle of Five Forks was a decisive American Civil War engagement in April 1865 in Virginia, where Union forces broke Confederate lines, leading directly to the fall of Petersburg and Richmond and the surrender at Appomattox.
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E.
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.
- 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: Fourth Battle of Petersburg Target entity description: The Fourth Battle of Petersburg was a late March 1865 Union offensive during the American Civil War that helped break Confederate defensive lines around Petersburg, Virginia, paving the way for the fall of Richmond and the war’s end.
-
A.
Third Battle of Petersburg
The Third Battle of Petersburg was the decisive Union assault in April 1865 that broke Confederate defenses around Petersburg, leading directly to the fall of Richmond and the endgame of the American Civil War.
-
B.
Second Battle of Petersburg
The Second Battle of Petersburg was a key June 1864 American Civil War clash in Virginia in which failed Union assaults against Confederate defenses led directly to the prolonged Siege of Petersburg.
-
C.
Siege of Petersburg
The Siege of Petersburg was a prolonged series of trench warfare operations in 1864–1865 around Petersburg, Virginia, whose eventual Union victory cut off Confederate supply lines and led directly to the fall of Richmond and the end of the American Civil War.
-
D.
Battle of Five Forks
The Battle of Five Forks was a decisive American Civil War engagement in April 1865 in Virginia, where Union forces broke Confederate lines, leading directly to the fall of Petersburg and Richmond and the surrender at Appomattox.
-
E.
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.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
American Civil War battle
ⓘ
battle ⓘ |
| alsoKnownAs | Battle of Fort Stedman NERFINISHED ⓘ |
| belligerent |
Confederate States of America
ⓘ
United States (Union) NERFINISHED ⓘ |
| campaign | Richmond–Petersburg Campaign NERFINISHED ⓘ |
| commander |
Robert E. Lee
NERFINISHED
ⓘ
Ulysses S. Grant NERFINISHED ⓘ |
| confederateArmy | Army of Northern Virginia NERFINISHED ⓘ |
| confederateCommanderRole | Robert E. Lee commanded the Army of Northern Virginia NERFINISHED ⓘ |
| confederateForcesCondition | outnumbered and resource-depleted ⓘ |
| confederateInitiative | offensive action ordered by Robert E. Lee ⓘ |
| confederatePlan | launch surprise pre-dawn attack on Union lines ⓘ |
| conflict | American Civil War ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| date | March 25, 1865 ⓘ |
| followedBy |
Appomattox Campaign
NERFINISHED
ⓘ
Fifth Battle of Petersburg NERFINISHED ⓘ |
| front | siege lines east of Petersburg ⓘ |
| frontlineFeature | entrenched siege fortifications ⓘ |
| impactOnGrant | enabled Grant to prepare final offensive against Petersburg ⓘ |
| impactOnLee | reduced Lee’s ability to defend Petersburg ⓘ |
| location | Petersburg, Virginia NERFINISHED ⓘ |
| notableEngagement | assault on Fort Stedman ⓘ |
| notableFortification | Fort Stedman NERFINISHED ⓘ |
| partOf | Siege of Petersburg NERFINISHED ⓘ |
| precededBy | Third Battle of Petersburg NERFINISHED ⓘ |
| primaryConfederateObjective | break the Union siege lines and relieve pressure on Petersburg ⓘ |
| primaryUnionObjective | break Confederate defensive lines around Petersburg ⓘ |
| relatedEvent |
Appomattox Court House surrender
NERFINISHED
ⓘ
Fall of Petersburg NERFINISHED ⓘ Fall of Richmond NERFINISHED ⓘ |
| result | Union victory ⓘ |
| strategicConsequence |
contributed to the end of the American Civil War
ⓘ
paved the way for the fall of Petersburg ⓘ paved the way for the fall of Richmond ⓘ weakened Confederate defenses at Petersburg ⓘ |
| tacticalOutcome | Union lines restored after initial Confederate gains ⓘ |
| theater | Eastern Theater of the American Civil War NERFINISHED ⓘ |
| typeOfOperation | offensive ⓘ |
| unionArmy | Army of the Potomac NERFINISHED ⓘ |
| unionCommanderRole | Ulysses S. Grant commanded the Union forces around Petersburg NERFINISHED ⓘ |
| unionForcesCondition | numerically superior ⓘ |
| unionResponse | rapid counterattack to seal breaches and retake positions ⓘ |
| year | 1865 ⓘ |
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: Fourth Battle of Petersburg Description of subject: The Fourth Battle of Petersburg was a late March 1865 Union offensive during the American Civil War that helped break Confederate defensive lines around Petersburg, Virginia, paving the way for the fall of Richmond and the war’s end.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.