The naval force of the Confederacy in Charleston Harbor consisted of three ironclads. Their steam-power was totally inadequate for the effective use of the vessels. In fact, when the wind and tide were moving in the same direction, it was impossible for the vessels to advance against them, light though the wind might be. Under such circumstances it was necessary to come to an anchor. On one occasion the ironclads Palmetto State and Chicora ran out of Charleston Harbor under favorable circumstances. The Palmetto State assaulted the Mercideta, commanded by Captain Stellwagen, who unconditionally surrendered. But the ironclad being under orders to follow her consort in chase of the enemy, and having no boats to which to transfer her prisoners, the parole of the officers and men was accepted, with their promise to observe the same until its return. The surrender was accepted, and an honest parole was the consideration for not being sunk on the spot. Captain Stellwagen abided but a short time, when, getting up steam, he broke his plighted word, and ran off with the captured vessel. The deficiency of speed on the part of the Confederate ironclads frustrated their efforts to relieve the city of Charleston from continued blockade.
The harbor defenses of Savannah were intrusted to Commodore Tatnall, who defended the approach to the city with a small steamer of one gun, an inefficient floating battery and ironclad, which had been constructed from a blockade-runner. Several attempts were made to attack the enemy's vessels with the ironclad, but these were frustrated by the delay in opening a passage through the obstructions in the river when tide and opportunity were offered. Her draught was too great for the depth of water, except at high tides, and these were at long intervals. The ironclad was armed with a battery of four guns, two seven-inch and two six-inch. Her force consisted of some twenty-one officers and twenty-four men, when she was fully furnished. Another vessel was under construction and nearly completed, and Commodore Tatnall, notwithstanding his well-known combative instincts, was understood to be unwilling to send the Atlanta alone against the enemy's blockading vessels. Lieutenant Webb, who had been lately placed in command of the Atlanta, took her to Warsaw Sound to deliver battle singly to the two ironclads Weehawken and Nahant, which awaited her approach. The Atlanta got twice aground—the second time, inextricably so. In this situation she was attacked, and, though hopelessly, was bravely defended, but was finally forced to surrender.
Mobile Harbor was thought to be adequately provided for, as torpedoes obstructed the approach, and Forts Morgan and Gaines commanded the entrance, aided by the improvised fleet of Admiral Buchanan, which consisted of the wooden gunboats Morgan and Gaines, each carrying six guns, and Selma four guns, with the ram Tennessee of six guns—in all, twenty-two guns and four hundred and seventy men. On August 4, 1864, Fort Gaines was assaulted by the United States force from the sea-side of the beach. The resistance made was feeble, and the fort soon surrendered. On the next day Admiral Farragut stood into the bay with a force consisting of four monitors, or ironclads, and fourteen steamers, carrying one hundred and ninety-nine guns and twenty-seven hundred men. One ironclad was sunk by a torpedo. Admiral Buchanan advanced to meet this force, and sought to run into the larger vessels with the Tennessee, but they avoided him by their superior speed. Meanwhile the gunboats became closely engaged with the enemy, but were soon dispersed by his overwhelming force. The Tennessee again stood for the enemy and renewed the attack with the hope of sinking some of them with her prow, but she was again foiled by their superior speed in avoiding her. The engagement with the whole fleet soon became general, and lasted an hour. Frequently the Tennessee was surrounded by the enemy, and all her guns were in action almost at the same moment. Four of their heaviest vessels ran into her under full steam with the view of sinking her. While surrounded by six of these heavy vessels which were suffering fearfully from her heavy battery, the steering-gear of the Tennessee was shot away, and her ability to manoeuvre was completely destroyed, leaving the formidable Confederate entirely at the disposal of the enemy. This misfortune, it was believed, saved the greater part of Farragut's fleet. Further resistance becoming unavailable, the wounded Admiral was under the painful necessity of ordering a surrender. His little fleet became a prey to the enemy, except the Morgan, which made good her escape to Mobile.
This unequal contest was decidedly creditable to the Confederacy. The entire loss of the enemy, most of which is ascribed to the Tennessee, amounted to quite three hundred in killed and wounded, exclusive of one hundred lost on the sunken ironclad, making a number almost as large as the entire Confederate force. On August 22d, Fort Morgan was bombarded from the land, also by ironclads at sea, and by the fleet inside. Thus Forts Powel, Morgan, and Gaines shared the fate of the Confederate fleet, and the enemy became masters of the bay. On this as on other occasions, the want of engines of sufficient power constituted a main obstacle to the success which the gallantry and skill of the seamen so richly deserved.
The system of torpedoes adopted by us was probably more effective than any other means of naval defense. The destructiveness of these little weapons had long been known, but no successful modes for their application to the destruction of the most powerful vessels of war and ironclads had been devised. It remained for the skill and ingenuity of our officers to bring the use of this terrible instrument to perfection. The success of their efforts is very frankly stated by one of the most distinguished of the enemy's commanders—Admiral Porter.[55] He says:
"Most of the Southern seaports fell into our possession with comparative facility; and the difficulty of capturing Charleston, Savannah, Wilmington, and Mobile was in a measure owing to the fact that the approaches to these places were filled with various kinds of torpedoes, laid in groups, and fired by electricity. The introduction of this means of defense on the side of the Confederates was for a time a severe check to our naval forces, for the commanders of squadrons felt it their duty to be careful when dealing with an element of warfare of which they knew so little, and the character and disposition of which it was so difficult to discover. In this system of defense, therefore, the enemy found their greatest security; and, notwithstanding all the efforts of Du Pont and Dahlgren, Charleston, Wilmington, and Savannah remained closed to our forces until near the close of the war."
In 1862, while General McClellan was in command of the enemy's forces below Richmond, it was observed that they had more than a hundred vessels in the James River, as if they were about to make an advance by that way upon the city. This led to an order placing General G. J. Rains in charge of the submarine defenses; and, on the James River opposite Drewry's Bluff, the first submarine torpedo was made. The secret of all his future success consisted in the sensitive primer, which is unrivaled by any other means to explode torpedoes or sub-terra shells.
The torpedoes were made of the most ordinary material generally, as, beer-barrels fixed with conical heads, coated within and without with rosin dissolved in coal-tar; some were made of cast-iron, copper, or tin; and glass demijohns were used. There were three essentials to success, viz., the sensitive fuse-primer, a charge of sixty pounds of gunpowder, and actual contact between the torpedo and the bottom of the vessel.
There were one hundred and twenty-three of these torpedoes placed in Charleston Harbor and Stono River. It was blockaded by thirteen large ships and ironclads, with six or seven storeships, and some twenty other vessels. The position of each one was known, and they could be approached within a half-mile, which made it easy to attack, destroy, or disperse them at night by floating torpedoes, connected together by twos by a rope one hundred and thirty yards long, buoyed up and stretched across the current by two boats, which were to be dropped in ebbing tide, to float down among the vessels. This plan, says General Rains, was opposed by General Gilmer, of the engineer corps, on the ground that "they might float back and destroy our own boat." One was sent down to go in the midst of the fleet, and made its mark. An act of devoted daring was here performed by Commander W. T. Glassell, Confederate States Navy, which claims more than a passing notice. While the enemy was slowly contracting his lines around Charleston, his numerous ships of war kept watch-and-ward outside of the harbor. Our few vessels, almost helpless by their defective engines, could effect little against their powerful opponents. The New Ironsides, the pride of their fleet, lay off Morris's Island. This Glassell resolved to attack with a steam-launch carrying a torpedo spar at the bow. With an engineer, pilot, and fireman, he steered for the Ironsides under cover of a hazy night. As he approached, he was hailed by the lookout, and the next moment struck the Ironsides, exploding the torpedo about fifteen feet from the keel. An immense volume of water was thrown up, covering the little boat, and, pieces of timber falling in the engine, it was rendered entirely unmanageable, so as to deprive Commander Glassell of the means of escape on which he had relied. A rapid fire was concentrated upon him from the deck of the ship, and there remained no chance except to attempt an escape by swimming ashore. To secure liberty to his country, he risked and lost his own, and found, for the indignity to which he was subjected, compensation, inasmuch as the famous New Ironsides was long rendered useless to the enemy.
One hundred and one torpedoes were planted in Roanoke River, North Carolina, after a flotilla of twelve vessels had started up to capture Fort Branch. The torpedoes destroyed six of the vessels and frustrated the attack.