Before the War of Secession, and indeed for twenty years after it, the United States never inclined to the maintenance of squadrons, properly so-called. It is true, a dozen fine ships-of-the-line were built during the sail period, but they never sailed together; and the essence of the battle-ship, in all eras, is combined action. Our squadrons, till long after I entered the navy, were simply aggregations of vessels, no two of which were necessarily of the same size or class. When a ship-of-the-line went to sea—which never happened in my time—she went without mates, a palpable paradox; a ship-of-the-line, which to no line belonged. Ours was a navy of single, isolated cruisers; and under that condition we had received a correct tradition that, whatever the nominal class of an American ship-of-war, she should be somewhat stronger than the corresponding vessels built by other nations. Each cruiser, therefore, would bring superior force to any field of battle at all possible to her. This was a perfectly just military conception, to which in great measure we owed our successes of 1812. The same rule does not apply to fleets, which to achieve the like superiority rely upon united action, and upon tactical facility obtained by the homogeneous qualities of the several ships, enabling them to combine greater numbers upon a part of the enemy. Therefore Great Britain, which so long ruled the world by fleets, attached less importance to size in the particular vessel. Class for class, her ships were weaker than those of her enemies, but in fleet action they usually won. At the period of which I am writing, the screw-propeller, having fairly established its position, prompted a reconstruction of the navy, with no change of the principles just mentioned. The cruiser idea dictated the classes of vessels ordered, and the idea of relative size prescribed their dimensions. There were to be six steam-frigates of the largest class, six steam-sloops, and six smaller vessels, a precise title for which I do not know. I myself have usually called them by the French name corvette, which has a recognized place in English marine phraseology, and means a sloop-of-war of the smaller class. A transfer of terms accompanying a change of system is apt to be marked by anomalies.
These eighteen vessels were the nucleus of the fighting force with which the government met the war of 1861. In the frigates and sloops steam was purely auxiliary; they had every spar and sail of the sailing ships to which they corresponded. Four of the larger sloops—the Hartford, Richmond, Brooklyn, and Pensacola—constituted the backbone of Farragut's fleet throughout his operations in the Mississippi. The Lancaster, one of the finest of these five sisters, was already in the Pacific, and there remained throughout the contest; while the San Jacinto, being of different type and size, was employed rather as a cruiser than for the important operations of war. It was she that arrested the Confederate commissioners, Slidell and Mason, on board the British mail-steamer Trent, in 1861. The corvettes for the most part were also employed as cruisers, being at once less effective in battery, for river work, and swifter. They alone of the vessels built in the fifties were engined for speed, as speed went in those days; but their sail power also was ample, though somewhat reduced. One of them, the Iroquois, accompanied Farragut to New Orleans, as did a sister ship to her, the Oneida, which was laid down in 1861, after many Southern Senators and Representatives had left their seats in Congress and the secession movement became ominous of war; when it began to be admitted that perhaps, after all, for sufficient cause, brothers might shed the blood of brothers.
The steam-frigates were of too deep draught to be of much use in the shoal waters, to which the nature of the hostilities and the character of the Southern coast confined naval operations. Being extremely expensive in upkeep, with enormous crews, and not having speed under steam to make them effective chasers, they were of little avail against an enemy who had not, and could not have, any ships at sea heavy enough to compete with them. The Wabash of this class bore the flag of Admiral Dupont at the capture of Port Royal; and after the fight the negroes who had witnessed it on shore reported that when "that checker-sided ship," following the elliptical course prescribed to the squadron for the engagement, came abreast the enemy's works, the gunners, after one experience, took at once to cover. No barbette or merely embrasured battery of that day could stand up against the twenty or more heavy guns carried on each broadside by the steam-frigates, if these could get near enough. At New Orleans, even the less numerous pieces of the sloops beat down opposition so long as they remained in front of Fort St. Philip and close to; but when they passed on, so the first lieutenant of one of them told me, the enemy returned to his guns and hammered them severely. This showed that the fort was not seriously injured nor its armament decisively crippled, but that the personnel was completely dominated by the fire of many heavy guns during the critical period required for the smaller as well as larger vessels to pass. As most of the river work was, of this character, the broadsides of the sloops were determinative, and those of the frigates would have been more so, could they have been brought to the scene; but they could not. Much labor was expended in the attempt to drag the Colorado, sister ship to the Wabash, across the bar of the Mississippi, but fruitlessly.
For the reason named, the screw-frigates built in the fifties had little active share in the Civil War. Were they then, from a national stand-point, uselessly built? Not unless preparation for war is to be rejected, and reliance placed upon extemporized means. To this resort our people have always been inclined to trust unduly, owing to a false or partial reading of history; but to it they were excusably compelled by the extensive demands of the War of Secession, which could scarcely have been anticipated. At the time these frigates were built, they were, by their dimensions and the character of their armaments, much the most formidable ships of their class afloat, or as yet designed. Though correctly styled frigates—having but one covered deck of guns—they were open to the charge, brought against our frigates in 1812 by the British, of being ships-of-the-line in disguise; and being homogeneous in qualities, they would, in acting together, have presented a line of battle extorting very serious consideration from any probable foreign enemy. It was for such purpose they were built; and it was no reproach to their designers that, being intended to meet a probable contingency, they were too big for one which very few men thought likely. At that moment, when the portentous evolution of naval material which my time has witnessed was but just beginning, they were thoroughly up-to-date, abreast and rather ahead of the conclusions as yet reached by contemporary opinion. The best of compliments was paid them by the imitation of other navies; for, when the first one was finished, we sent her abroad on exhibition, much like a hen cackling over its last performance, with the result that we had not long to congratulate ourselves on the newest and best thing. It is this place