The attack on the sea front of Sebastopol by the allied fleets on 17 October, 1854, was the event that brought home to the minds of even the most conservative the necessity of a great change in warship construction. It rang the knell of the old wooden walls, and led to the introduction of armour-clad navies.
The idea of protecting ships from the fire of artillery and musketry by iron plating was an old one, and the wonder is that it did not much earlier receive practical application. The Dutch claim to have been the pioneers of ironclad building more than three hundred years ago. During the famous siege of Antwerp by the Spaniards in 1585 the people of the city built a huge flat-bottomed warship, armoured with heavy iron plates, which they named the "Finis Belli," a boastful expression of the hope that she would end the war. An old print of the "Finis Belli" shows a four-masted ship with a high poop and forecastle, but with a low freeboard amidships. On this lower deck, taking up half the length of the ship, is an armoured citadel, with port-holes for four heavy guns on each side. The roof of the citadel has a high bulwark, loopholed for musketry. On three of the masts there are also crow's-nests or round tops for musketeers.
Heavily weighted with her armour, the ship had a deep draught of water, and probably steered badly. In descending the Scheldt to attack the Spaniards she ran aground in a hopeless position under their batteries, and fell into the hands of the Spanish commander, the Duke of Parma. He kept the "Finis Belli" "as a curiosity" till the end of the siege, and then had her dismantled. If she had scored a success, armoured navies would no doubt have made their appearance in the seventeenth century.
Between the days of the "Finis Belli" and the coming of the first ironclads there were numerous projects of inventors. In 1805 a Scotchman, named Gillespie, proposed the mounting of guns and "ponderous mortars" in revolving armoured turrets, both in fortifications on shore and on floating batteries. Two years later Abraham Bloodgood, of New York, designed a floating battery with an armoured turret. During the war between England and the United States in 1812 an American engineer, John Steevens, who was a man in advance of his time, proposed the construction of a steam-propelled warship, with a ram-bow, and with her guns protected by shields. He prepared a design, but failed to persuade the Navy Department that it was practicable. His son, Robert L. Steevens, improved the design, made experiments with guns, projectiles, and armour plates, and at last in 1842 obtained a vote of Congress for the building of the "Steevens battery," a low-freeboard ram, steam-propelled, and armed with eight heavy guns mounted on her centre-line, on turntables protected by armoured breastworks. The methods of the American navy were very dilatory, professional opinion was opposed to Steevens, whose project was regarded as that of a "crank," and the ship was left unfinished for years. She was still on the stocks when the Civil War began. Then other types came into fashion, and she was broken up on the ways.
The man who introduced the armour-clad ship into the world's navies was the Emperor Napoleon III, the same who introduced rifled field artillery into the armies of the world. Like other great revolutions, this epoch-making change in naval war began in a small way. What forced the question upon the Emperor's attention was the failure of the combined French and English fleets in the attack on the sea-forts of Sebastopol on 17 October, 1854. The most powerful ships in both navies had engaged the sea-forts, and suffered such loss and injury that it was obvious that if the attack had been continued the results would have been disastrous. Some means must be found of keeping explosive shells out of a ship's gun-decks, if they were ever to engage land batteries on anything like equal terms. Under the Emperor's directions the French naval architects designed four ships of a new type, which were rapidly constructed in the Imperial dockyards. They were "floating batteries," not intended to take part in fleet actions, but only to be used against fortifications. Their broad beam, heavy lines, rounded bows, and engines of only 225 horsepower, condemned them to slow speed, just sufficient to place them in firing position. They were armoured with 4-inch iron and armed with eighteen 50-pounder guns. The port-holes had heavy iron ports, which were closed while the guns were reloading.
Three of these floating batteries, the "Dévastation," "Lave," and "Tonnant," came into action against the shore batteries at Kinburn on 17 October, 1855 (the anniversary of the attack on the Sebastopol sea-forts). There was some difficulty in getting into position, as they could just crawl along, and steered abominably. But when they opened fire at 800 yards at 9 a.m. they silenced and wrecked the Russian batteries in eighty-five minutes, themselves suffering only trifling damage, and not losing a dozen men.
It was the first and last fight of the floating batteries. But while in England men were still discussing the problem of the sea-going ironclad, the French constructors were solving it. They had to look not to parliamentary and departmental committees, but to the initiative and support of an intelligent autocrat. So events went quicker in France. In 1858 the keels of the first three French sea-going armour-clads were laid down at Toulon, and next year the armoured frigate "Gloire," the first of European ironclads, was launched, and every dockyard in France was busy constructing armour-clads or rebuilding and armouring existing ships.
France had gained a start in the building of the new type of warship. When the "Dreadnought" was launched, it was said somewhat boastfully that single-handed she could destroy the whole North Sea fleet of Germany. It might be more truly said of the "Gloire" that she could have met single-handed and destroyed the British Channel or Mediterranean Fleet of the day. It was the moment when tension with France over the Orsini conspiracy had caused a widespread anticipation of war between that country and England, and had called the Volunteer force into existence to repel invasion. But the true defence must be in the command of the sea, and the first English ironclad, the old "Warrior," was laid down at the Thames Ironworks. Work was begun in June, 1859, and the ship was launched in December, 1860. She was modelled on the old steam frigates, for the special types of modern battleships and armoured cruisers were still in the future. She was built of iron, with unarmoured ends and 4 ¼-inch iron plating on a backing of 18 inches of teak over 200 feet amidships of her total length of 380 feet. There was a race of ironclad building between France and England, in which the latter won easily, and it was only for a very short time that our sea supremacy was endangered by the French Emperor's naval enterprise. But when the English and French fleets entered the Gulf of Mexico in 1861, our ships were all wooden walls, while the French admiral's flag flew on the ironclad "Normandie," the first armoured ship that ever crossed the Atlantic.
Notwithstanding this fact, American writers are fond of saying, and many Englishmen believe, that the introduction of armoured navies was the outcome of the American Civil War of the early 'sixties. All that is true is that the War of Secession gave the world the spectacle of the first fight between armour-clad ships, and the experiences of that war greatly influenced the direction taken in the general policy of designers of ironclad warships.