The Atlanta was a casemate ironclad that served in the Confederate and Union Navies during the American Civil War. She was converted from a Scottish-built blockade runner named Fingal by the Confederacy after she made one run to Savannah, Georgia. After several failed attempts to attack Union blockaders, the ship was captured by two Union monitors in 1863 when she ran aground. Atlanta was floated off, repaired, and rearmed, serving in the Union Navy for the rest of the war. She spent most of her time deployed on the James River supporting Union forces there. The ship was decommissioned in 1865 and placed in reserve.