Encyclopedia · People, inventors, and ordnance officers

John A. Dahlgren

Rear Admiral John A. B. Dahlgren (1809-1870) headed the U.S. Navy's Ordnance Bureau and designed the Dahlgren guns, the distinctive bottle-shaped naval ordnance of the Civil War era.

Also known as: John A. B. Dahlgren, Admiral Dahlgren.

BornPhiladelphia, Pennsylvania, 1809
Died1870
ServiceUnited States Navy, from midshipman to rear admiral
Ordnance roleHead of the Navy's Ordnance Bureau, 1862
Known forDahlgren guns; commanded the South Atlantic Blockading Squadron

Career and guns

John Adolphus Bernard Dahlgren was born in Philadelphia and entered the Navy as a midshipman at sixteen. Assigned to the Navy's ordnance work at Washington in 1847, he became head of the Washington Navy Yard in 1861, head of the Navy Ordnance Bureau as a captain in 1862, and a rear admiral in July 1863 commanding the South Atlantic Blockading Squadron.

Dahlgren's ordnance is usually grouped as bronze boat howitzers and rifles, iron smoothbores, and iron rifles. He designed the smoothbore shell guns primarily for boats patrolling the waterways; their thick, curved breech, contoured to the pressures within, gave them their characteristic bottle shape.

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Sources & further reading

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