John A. Dahlgren

E391303

American Civil War military personnel United States Navy officer human military officer ordnance expert weapons designer

John A. Dahlgren was a prominent U.S. Navy officer and ordnance innovator during the American Civil War, best known for developing the distinctive Dahlgren gun.

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All labels observed (2)

Label	Occurrences
John Adolphus Bernard Dahlgren	2
John A. Dahlgren canonical	1

How this entity was disambiguated

This entity first appeared as the object of triple T3816044 — 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: John A. Dahlgren
Context triple: [South Atlantic Blockading Squadron, notableCommander, John A. Dahlgren]

A. Samuel L. M. Barlow
Samuel L. M. Barlow is a notable individual who shares the surname Barlow and is recognized as a distinguished bearer of that name.
B. Isaac G. Perry
Isaac G. Perry was a prominent 19th-century American architect best known for his extensive work on public buildings and armories throughout New York State.
C. Stephen R. Mallory
Stephen R. Mallory was an American politician who served as the Confederate States' Secretary of the Navy during the American Civil War.
D. Alvan C. Gillem
Alvan C. Gillem was a United States Army officer and Civil War veteran who later led federal troops in campaigns against Native American groups in the West.
E. William T. Sampson
William T. Sampson was a United States Navy admiral best known for leading American naval forces during the Spanish–American War, particularly in the Battle of Santiago de Cuba.
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: John A. Dahlgren
Target entity description: John A. Dahlgren was a prominent U.S. Navy officer and ordnance innovator during the American Civil War, best known for developing the distinctive Dahlgren gun.

A. Samuel L. M. Barlow
Samuel L. M. Barlow is a notable individual who shares the surname Barlow and is recognized as a distinguished bearer of that name.
B. Isaac G. Perry
Isaac G. Perry was a prominent 19th-century American architect best known for his extensive work on public buildings and armories throughout New York State.
C. Stephen R. Mallory
Stephen R. Mallory was an American politician who served as the Confederate States' Secretary of the Navy during the American Civil War.
D. Alvan C. Gillem
Alvan C. Gillem was a United States Army officer and Civil War veteran who later led federal troops in campaigns against Native American groups in the West.
E. William T. Sampson
William T. Sampson was a United States Navy admiral best known for leading American naval forces during the Spanish–American War, particularly in the Battle of Santiago de Cuba.
F. None of above. chosen

Statements (47)

Predicate	Object
instanceOf	American Civil War military personnel ⓘ United States Navy officer ⓘ human ⓘ military officer ⓘ ordnance expert ⓘ weapons designer ⓘ
allegiance	Union ⓘ United States of America ⓘ
burialPlace	Laurel Hill Cemetery ⓘ Philadelphia ⓘ surface form: Philadelphia, Pennsylvania
causeOfDeath	heart disease ⓘ
child	Ulric Dahlgren ⓘ
commanded	South Atlantic Blockading Squadron ⓘ Washington Navy Yard ⓘ
conflict	American Civil War ⓘ
countryOfCitizenship	United States of America ⓘ
dateOfBirth	1809-11-13 ⓘ
dateOfDeath	1870-07-12 ⓘ
employer	United States Navy ⓘ
ethnicOrigin	Swedish American ⓘ
familyName	Dahlgren ⓘ
fieldOfWork	artillery design ⓘ naval ordnance ⓘ
fullName	John A. Dahlgren self-linksurface differs ⓘ surface form: John Adolphus Bernard Dahlgren
givenName	John ⓘ
hasPartNamedAfter	Dahlgren, Virginia ⓘ USS Dahlgren ⓘ
knownFor	development of the Dahlgren gun ⓘ innovations in naval gunnery ⓘ
militaryBranch	United States Navy ⓘ
militaryRank	captain ⓘ rear admiral ⓘ
notableAchievement	introduced new shell guns for naval warfare ⓘ standardized naval artillery for the U.S. Navy ⓘ
notableWork	Dahlgren gun ⓘ Dahlgren gun ⓘ surface form: Dahlgren shell gun
occupation	naval officer ⓘ ordnance officer ⓘ
placeOfBirth	Philadelphia ⓘ surface form: Philadelphia, Pennsylvania
placeOfDeath	Washington, D.C. ⓘ
positionHeld	Chief of the Bureau of Ordnance, U.S. Navy ⓘ Commander, South Atlantic Blockading Squadron ⓘ
residence	Philadelphia ⓘ surface form: Philadelphia, Pennsylvania Washington, D.C. ⓘ
sexOrGender	male ⓘ
spouse	Madeleine Vinton Dahlgren NERFINISHED ⓘ
workLocation	Washington Navy Yard ⓘ

How these facts were elicited

Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

South Atlantic Blockading Squadron → notableCommander → John A. Dahlgren ⓘ

this entity surface form: John Adolphus Bernard Dahlgren

John A. Dahlgren → fullName → John A. Dahlgren self-linksurface differs ⓘ