Maryland Campaign
E145572
The Maryland Campaign was Confederate General Robert E. Lee’s first major invasion of the North during the American Civil War in 1862, culminating in the Battle of Antietam.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Maryland Campaign canonical | 20 |
| Maryland Campaign of 1862 | 4 |
| Antietam Campaign | 2 |
| Maryland Campaign of the American Civil War | 2 |
| Confederate invasion of the North | 1 |
| Maryland campaign | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1080870 — 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: Maryland Campaign Context triple: [Army of Northern Virginia, engagedIn, Maryland Campaign]
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A.
Northern Virginia Campaign
The Northern Virginia Campaign was a series of American Civil War battles in the summer of 1862 in which Confederate forces under Robert E. Lee drove Union armies out of Virginia, culminating in the Second Battle of Bull Run.
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B.
Gettysburg Campaign
The Gettysburg Campaign was a major 1863 Confederate offensive into Union territory during the American Civil War that culminated in the pivotal Battle of Gettysburg.
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C.
Peninsula Campaign
The Peninsula Campaign was a major Union offensive in the American Civil War in 1862, in which Union forces attempted to capture the Confederate capital of Richmond by advancing up the Virginia Peninsula.
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D.
Appomattox Campaign
The Appomattox Campaign was the final series of military operations in the American Civil War that led to the surrender of Confederate General Robert E. Lee’s Army of Northern Virginia in April 1865.
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E.
Valley Campaign of 1862
The Valley Campaign of 1862 was Confederate General Stonewall Jackson’s famed Civil War offensive in Virginia’s Shenandoah Valley, noted for its rapid maneuvers and strategic impact far beyond its small scale.
- 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: Maryland Campaign Target entity description: The Maryland Campaign was Confederate General Robert E. Lee’s first major invasion of the North during the American Civil War in 1862, culminating in the Battle of Antietam.
-
A.
Northern Virginia Campaign
The Northern Virginia Campaign was a series of American Civil War battles in the summer of 1862 in which Confederate forces under Robert E. Lee drove Union armies out of Virginia, culminating in the Second Battle of Bull Run.
-
B.
Gettysburg Campaign
The Gettysburg Campaign was a major 1863 Confederate offensive into Union territory during the American Civil War that culminated in the pivotal Battle of Gettysburg.
-
C.
Peninsula Campaign
The Peninsula Campaign was a major Union offensive in the American Civil War in 1862, in which Union forces attempted to capture the Confederate capital of Richmond by advancing up the Virginia Peninsula.
-
D.
Appomattox Campaign
The Appomattox Campaign was the final series of military operations in the American Civil War that led to the surrender of Confederate General Robert E. Lee’s Army of Northern Virginia in April 1865.
-
E.
Valley Campaign of 1862
The Valley Campaign of 1862 was Confederate General Stonewall Jackson’s famed Civil War offensive in Virginia’s Shenandoah Valley, noted for its rapid maneuvers and strategic impact far beyond its small scale.
- F. None of above. chosen
Statements (47)
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: Maryland Campaign Description of subject: The Maryland Campaign was Confederate General Robert E. Lee’s first major invasion of the North during the American Civil War in 1862, culminating in the Battle of Antietam.
Referenced by (30)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Antietam Campaign
subject surface form:
George B. McClellan
this entity surface form:
Maryland Campaign of the American Civil War
this entity surface form:
Antietam Campaign
this entity surface form:
Confederate invasion of the North
this entity surface form:
Maryland Campaign of 1862
subject surface form:
Joseph Hooker
this entity surface form:
Maryland Campaign of 1862
this entity surface form:
Maryland Campaign of the American Civil War
this entity surface form:
Maryland Campaign of 1862
this entity surface form:
Maryland campaign
this entity surface form:
Maryland Campaign of 1862