This was especially true of the navy. The fighting under and against Farragut and his fellow-admirals revolutionized naval warfare. The Civil War marks the break between the old style and the new. Terrible encounters took place when the terrible new engines of war were brought into action for the first time; and one of these encounters has given an example which, for heroic daring combined with cool intelligence, is unsurpassed in all time.

The Confederates showed the same skill and energy in building their great ironclad rams as the men of the Union did in building the monitors which were so often pitted against them. Both sides, but especially the Confederates, also used stationary torpedoes, and, on a number of occasions, torpedo-boats likewise. These torpedoboats were sometimes built to go under the water. One such, after repeated failures, was employed by the Confederates, with equal gallantry and success, in sinking a Union sloop of war off Charleston harbor, the torpedoboat itself going down to the bottom with its victim, all on board being drowned. The other type of torpedo-boat was simply a swift, ordinary steam-launch, operated above water.