He then introduced a cast-iron muzzle-loading cannon with vastly increased range and accuracy, known as the. That became the Navy's standard armament.Dahlgren was made Commander of the Washington Navy Yard, where he established the Bureau of Ordnance. In 1863, he took command of the South Atlantic Blockading Squadron at the rank of Rear Admiral, and helped William Tecumseh Sherman secure Savannah, Georgia.
The item "1800s Rear Admiral John A Dahlgren Autographed Signed Note Civil War" is in sale since Monday, September 21, 2015. This item is in the category "Collectibles\Autographs\Historical". The seller is "zartanthegreat1" and is located in Woodstock, Georgia. This item can be shipped worldwide.