CSS Alabama , a 1050-ton screw steam sloop of war, was built at Cammel Lairds Birkenhead, England, for the Confederate Navy. After leaving England in the guise of a merchant ship, she rendezvoused at sea with supply ships, was outfitted as a combatant and placed in commission on 24 August 1862. Commanded by Captain Raphael Semmes , Alabama cruised in the North Atlantic and West Indies during the rest of 1862, capturing over two-dozen Union merchant ships, of which all but a few were burned. Among those released was the mail steamer Ariel , taken off Cuba on 7 December with hundreds of passengers on board. she was the 293rd ship to be built here and lasted 2 years before being sunk.