commerce raiding by css "alabama" and css "florida", both built in english yards, reached a point in 1863 where continued peaceful relations between the united states and great britain were seriously jeopardized. as a result, congress responded by authorizing construction of a new class of screw frigates as part of the naval procurement bill of that year. these vessels, designed to be the fastest in the world, were intended for use in hit-and-run operations against british ports and commerce in the event of war. "wampanoag" was the lead ship of this class, which also included the "madawaska".