• Kotetsu, a Japanese ironclad battleship, was originally intended to be Stonewall of the Confederate States Navy but was not delivered until after the end of the American Civil War?
• Dupuy de Lôme was a 19th century French naval architect, who developed the first steam battleship, the first sea-going ironclad warship, and the first large airship in history?

Facts on topics related to Ironclad

Ironclad warship

• the first submarine boat and self-propelled torpedo, and the engines for the ironclad warship USS Monitor were all built at the foundry operated by Cornelius DeLameter?
• the three Habsburg class battleships were the first ocean-going battleships built by the Austro-Hungarian Navy since the ironclad SMS Tegetthoff of the 1870s?

Battle of Hampton Roads

• the clapping game Mary Mack may refer to the Battle of Hampton Roads?