From 1861-1865, the American Civil War raged at sea as well as on land and saw the use of numerous technological innovations, chief among them the ironclad warship. While various Civil War biographical directories exist, none have been devoted exclusively to the men who served as ironclad captains along the coasts or on the great inland rivers. Based on the Official Records, earlier biographical compilations and memoirs, ship and operations histories, newspapers, primary sources, and internet data, this is the first work to profile the men North and South charged with outfitting and fighting these revolutionary metal warships.

Each of the 158 biographies includes (where known) birth, death, and pre- and post-war careers. Information on wartime service includes vessels served upon or commanded, with ironclads bolded for emphasis. Each profile includes source documentation and an appendix, Ironclad Index, alphabetically identifies the various covered ironclads and lists the covered captains of each.