This chapter explores the historical clash between the Union's Monitor and the Confederate's Virginia, emphasizing the transformative impact of ironclad ships on naval warfare. It details the harrowing journey of the Monitor and the ensuing rescue operation amidst treacherous conditions, highlighting the bravery of the crew during desperate times. The chapter also introduces the H.L. Hunley, the first successful combat submarine, chronicling its innovative design and the daring mission that led to its infamous strike against an enemy vessel.