View showing the turret of the USS Terror, originally named the USS Agmenticus. Laid down in Portsmouth Navy Yard in Maine in 1862, launched in 1863, commissioned in 1864 at Portsmouth under the command of C. H. Cushman, decommissioned at the Boston Navy Yard in 1865, the monitor's name was changed to "Terror" in 1869. After being recommissioned in 1870, Terror came to the Philadelphia Navy Yard in 1872. The facility, which built, overhauled, stored, and disposed of warships, operated in Southwark until 1876 when the Navy Yard enlarged and relocated to League Island.
