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John A. Dahlgren
(November 13, 1809 – July 12, 1870) was a
United States Navy
officer who founded the Navy's Ordnance Department and launched major advances in
gunnery
. He introduced a cast-iron muzzle-loading cannon with vastly increased range and accuracy, known as the
Dahlgren gun
, which became the Navy's standard armament. During the
American Civil War
, he was made the commander of the
Washington Navy Yard
. He also served at sea, being put in command of the
South Atlantic Blockading Squadron
.
Photograph credit:
Mathew Brady
; restored by
Jebulon
Archive
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