The CSS Manassas was a pioneering ironclad warship built in 1855, originally serving as the steam icebreaker Enoch Train before its conversion for Confederate use during the American Civil War. Constructed by James O. Curtis in Medford, Massachusetts, the vessel was a twin-screw towboat measuring approximately 128 feet in length, with a hull beam of 26 feet and a draft of 11 feet. Its most distinctive feature was its radical design: a curved "turtle-back" hull covered with 1.25-inch iron plating, which provided a low profile and protected against enemy fire. The hull projected only about 6.5 feet above the waterline when fully loaded, making it a difficult target. The ship's bow was fitted with a pointed iron ram designed to sink Union vessels, and it also carried a forward-firing cannon behind an armored shutter, enhancing its offensive capabilities. Fitting out at Algiers, Louisiana, the Manassas was the first ironclad built for the Confederacy, with its curved armor intended to cause cannon shots to glance off harmlessly. She was commissioned as a privateer in September 1861, shortly after her capture by Union privateer CSS Ivy, and was soon seized by Confederate authorities for service on the Mississippi River. Under Lieutenant A. F. Warley, she participated in the Battle of the Head of Passes in October 1861, where she rammed USS Richmond and sustained damage to her iron prow and smokestacks. Despite her damage, she managed to retreat under heavy Union fire. Later, CSS Manassas joined Confederate forces during the Battle of Forts Jackson and St. Philip, where she actively engaged Union ships, attempting to ram USS Pensacola, USS Mississippi, and USS Brooklyn, firing her single cannon during these attacks. During the engagement with the Union fleet, she ran aground while evading an attack by USS Mississippi. The vessel caught fire and ultimately exploded, sinking beneath the river in 1862. The wreck was located in 1981 by the National Underwater and Marine Agency. The CSS Manassas's innovative design and active combat service made her a notable example of early Confederate ironclad ingenuity and naval strategy during the Civil War.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.