USS Agamenticus was one of four s built for the United States Navy during the American Civil War. Commissioned as the war was ending in May 1865, the ironclad saw no combat and was decommissioned in September and placed in reserve. The ship was reactivated in 1870, having been renamed Terror the previous year, and was assigned to the North Atlantic Fleet where she served in the Caribbean Sea. The monitor was decommissioned again in 1872 and was sold for scrap two years later. The Navy Department evaded the Congressional refusal to order new ships by claiming that the Civil War-era ship was being repaired while building a new monitor of the same name. Description The Miantonomoh class was designed by John Lenthall, Chief of the Bureau of Construction and Repair, although the ships varied somewhat in their details. Agamenticus was long overall, had a beam of and had a draft of . The ship had a depth of hold of , a tonnage of 1,564 tons burthen and displaced . She was fitted with a breakwater to protect the forward gun turret from flooding in high seas. Her crew consisted of 150 officers and enlisted men. Agamenticus was powered by a pair of two-cylinder horizontal vibrating-lever steam engines, each driving one four-bladed propeller about in diameter using steam generated by four Martin vertical water-tube boilers. The engines were rated at and gave the ship a top speed of . She was designed to carry of coal. Armament and armor Her main battery consisted of four smoothbore, muzzle-loading, Dahlgren guns mounted in two twin-gun turrets, one each fore and aft of the single funnel. Each gun weighed approximately . They could fire a shell up to a range of at an elevation of +7°. The sides of the hull of the Miantonomoh-class ships were protected by five layers of wrought-iron plates that tapered at their bottom edge down to total of , backed by of wood. The armor of the gun turret consisted of ten layers of one-inch plates and the pilot house had eight layers. The ship's deck was protected by armor thick. The bases of the funnel and the ventilator were also protected by unknown thicknesses of armor. Construction and career Agamenticus was named after Mount Agamenticus in York County, Maine. The monitor was laid down in 1862 at the Portsmouth Navy Yard in Kittery, Maine and launched