Answer: merrimac

AnswerCrossword Clue
MERRIMAC

Monitor's opponent

MERRIMAC

Historic ship.

MERRIMAC

Frigate of 1862.

MERRIMAC
Historic ironclad.
MERRIMAC
Historic warship.
MERRIMACCivil War vessel
MERRIMACThe South's ironclad
MERRIMACWarship of 1862