Battle of Sharpsburg
E523893
The Battle of Sharpsburg, also known as the Battle of Antietam, was a major American Civil War clash in Maryland in 1862 that became the bloodiest single-day battle in U.S. history and led to President Abraham Lincoln issuing the Emancipation Proclamation.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Battle of Sharpsburg canonical | 2 |
| Burnside front at Antietam | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5150157 — 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 Sharpsburg Context triple: [1st Texas Infantry, engagement, Battle of Sharpsburg]
-
A.
Battle of Shepherdstown
The Battle of Shepherdstown was a minor but strategically important American Civil War engagement in September 1862, marking the Confederate rearguard action as Robert E. Lee’s army withdrew across the Potomac River after the Maryland Campaign.
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B.
Battle of Marye's Heights
The Battle of Marye's Heights was a key phase of the American Civil War’s Battle of Fredericksburg, marked by devastating Union assaults against well-entrenched Confederate forces on a fortified ridge above the town.
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C.
Battle of Chancellorsville
The Battle of Chancellorsville was a major American Civil War engagement in 1863 in Virginia, noted for Confederate General Robert E. Lee’s audacious and tactically brilliant victory over a much larger Union force.
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D.
Battle of Rappahannock Station
The Battle of Rappahannock Station was an American Civil War engagement in November 1863 in Virginia, where Union forces successfully stormed Confederate fortifications along the Rappahannock River, securing a significant tactical victory.
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E.
Battle of Mechanicsville
The Battle of Mechanicsville was an 1862 American Civil War engagement near Richmond, Virginia, marking the opening clash of Robert E. Lee’s Seven Days Campaign against Union forces during the Peninsula 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: Battle of Sharpsburg Target entity description: The Battle of Sharpsburg, also known as the Battle of Antietam, was a major American Civil War clash in Maryland in 1862 that became the bloodiest single-day battle in U.S. history and led to President Abraham Lincoln issuing the Emancipation Proclamation.
-
A.
Battle of Shepherdstown
The Battle of Shepherdstown was a minor but strategically important American Civil War engagement in September 1862, marking the Confederate rearguard action as Robert E. Lee’s army withdrew across the Potomac River after the Maryland Campaign.
-
B.
Battle of Marye's Heights
The Battle of Marye's Heights was a key phase of the American Civil War’s Battle of Fredericksburg, marked by devastating Union assaults against well-entrenched Confederate forces on a fortified ridge above the town.
-
C.
Battle of Chancellorsville
The Battle of Chancellorsville was a major American Civil War engagement in 1863 in Virginia, noted for Confederate General Robert E. Lee’s audacious and tactically brilliant victory over a much larger Union force.
-
D.
Battle of Rappahannock Station
The Battle of Rappahannock Station was an American Civil War engagement in November 1863 in Virginia, where Union forces successfully stormed Confederate fortifications along the Rappahannock River, securing a significant tactical victory.
-
E.
Battle of Mechanicsville
The Battle of Mechanicsville was an 1862 American Civil War engagement near Richmond, Virginia, marking the opening clash of Robert E. Lee’s Seven Days Campaign against Union forces during the Peninsula Campaign.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
American Civil War battle
ⓘ
battle ⓘ |
| alsoCalledByConfederates | Battle of Sharpsburg NERFINISHED ⓘ |
| alsoCalledByUnion | Battle of Antietam NERFINISHED ⓘ |
| belligerent |
Confederate States of America
ⓘ
Union ⓘ |
| campaignObjective | Confederate invasion of the North NERFINISHED ⓘ |
| commander |
George B. McClellan
NERFINISHED
ⓘ
Robert E. Lee NERFINISHED ⓘ |
| commemoratedBy | annual reenactments and ceremonies ⓘ |
| ConfederateArmy | Army of Northern Virginia NERFINISHED ⓘ |
| ConfederateCasualtiesApprox | about 10,300 ⓘ |
| ConfederateStrengthApprox | about 38,000 soldiers ⓘ |
| conflictIn | American Civil War NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| county | Washington County, Maryland NERFINISHED ⓘ |
| date | September 17, 1862 ⓘ |
| followedBy | Battle of Fredericksburg NERFINISHED ⓘ |
| front | Eastern Theater of the American Civil War NERFINISHED ⓘ |
| hasAlias |
Antietam
NERFINISHED
ⓘ
Battle of Antietam NERFINISHED ⓘ |
| hasWikipediaPage | https://en.wikipedia.org/wiki/Battle_of_Antietam NERFINISHED ⓘ |
| knownFor | bloodiest single-day battle in American history ⓘ |
| LincolnAction | led to preliminary Emancipation Proclamation NERFINISHED ⓘ |
| memorialSite | Antietam National Battlefield NERFINISHED ⓘ |
| militarySignificance | halted first major Confederate invasion of the North ⓘ |
| notableDocument | Special Order 191 (Lost Order) context ⓘ |
| notableLocation |
Burnside Bridge
NERFINISHED
ⓘ
Cornfield NERFINISHED ⓘ Sunken Road NERFINISHED ⓘ |
| notableOutcome | McClellan failed to destroy Lee’s army ⓘ |
| partOf | Maryland Campaign NERFINISHED ⓘ |
| politicalImpact |
discouraged potential European recognition of the Confederacy
ⓘ
enabled Abraham Lincoln to issue Emancipation Proclamation ⓘ |
| precededBy | Battle of South Mountain NERFINISHED ⓘ |
| result | tactically inconclusive ⓘ |
| state | Maryland ⓘ |
| strategicResult | Union strategic advantage ⓘ |
| tookPlaceIn | Sharpsburg, Maryland NERFINISHED ⓘ |
| tookPlaceNear | Antietam Creek NERFINISHED ⓘ |
| totalCasualtiesApprox | about 23,000 ⓘ |
| typeOfEngagement | land battle ⓘ |
| UnionArmy | Army of the Potomac NERFINISHED ⓘ |
| UnionCasualtiesApprox | about 12,400 ⓘ |
| UnionStrengthApprox | about 75,000 soldiers ⓘ |
| year | 1862 ⓘ |
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 Sharpsburg Description of subject: The Battle of Sharpsburg, also known as the Battle of Antietam, was a major American Civil War clash in Maryland in 1862 that became the bloodiest single-day battle in U.S. history and led to President Abraham Lincoln issuing the Emancipation Proclamation.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Burnside front at Antietam