The American Civil War was a bloody affair, where many battles were fought with infantry tactics that had been around for 100 years. But some weapons designers pushed the envelope of technology during the violent conflict and developed arms that would revolutionize the way militaries fight for centuries.
1. The Repeating Rifle
Although the primary weapon on both sides of the war was the rifled musket, the repeating rifle made its combat debut during the Civil War. The introduction of the percussion cap and the cartridge allowed for the creation of breech-loading rifles, far superior in reloading speed than muzzle-loaders. The weapon truly came into its own though in the form of the Spencer repeating rifle. The rifle fired seven .56 caliber bullets from a tube magazine in the buttstock. A lever-action discharged and loaded the rounds.
The real revolution from the weapon came from a change in infantry tactics. The cartridge and ability to fire multiple rounds in quick secession meant soldiers no longer had to stand massed against each other. Instead, they could maneuver more and even take advantage of cover and concealment by kneeling and lying down while still being able to fire. Unfortunately, the generals of the time were worried that troops would waste too much ammunition so the rifles only saw limited use.
2. The Gatling Gun
Before John Gatling's invention, there was no way to provide sustained high rates of fire. Although not a true automatic weapon, the hand-cranked, multi-barreled weapon could deliver rounds down range at upwards of 450 per minute. With no links or feed belts, the weapon was gravity fed. The use of multiple barrels limited overheating and allowed for longer sustained rates of fire.
The introduction of rapid fire weapons quickly changed the nature of warfare. No longer could mass infantry formations be used – they would be mowed down by the higher rates of fire. This was a lesson that would not be sufficiently learned until the brutal combat of World War I.
During the Civil War, Gatling guns saw limited action because, once again, the war department feared a waste of ammunition. Most guns used in combat were purchased personally by generals. The rotating barrels of the Gatling gun would later come to prominence in automatic weapons like the GAU-17 minigun and Vulcan 20mm cannon.
At the outbreak of the Civil War, warship design was just beginning to incorporate steam power. Most vessels were still wooden and powered by sail, but the British and French started to add armor-plating the sides of existing ship designs. From the beginning of the war, both the Union and the Confederacy sought to acquire ironclad warships. Their homegrown designs first met at the Battle of Hampton Roads in March 1862.
The Confederate CSS Virginia, a casemate ironclad, defeated three Union ships before encountering the Union's USS Monitor. Though the battle ended in a draw with neither ship able to defeat the other, naval warfare was forever changed. In particular, the Monitor gave its name to a new type of warship.
These were low to the waterline and used rotating turrets to house their armament rather than the typical broadsides of a sailing ship. After news of the battle traveled abroad, many nations ceased production of wooden warships in favor of the new monitor-type. The turret has been a prominent design feature of warships ever since.
4. The Submarine
Though it was the Union that had superior industrial capabilities it was the Confederacy that launched the only submarine of the war. That submarine, the H.L. Hunley would be the first such ship to successfully attack and sink an enemy ship.
With a length of just 40 feet and a crew of eight using a hand-cranked shaft to propel her through the water, the Hunley was a far cry from the submarines that would appear in the early 20th century.
The Hunley was armed with just a single spar torpedo – an explosive charge attached to the end of a wooden pole – that was used to successfully sink the USS Housatonic on February 17, 1864.
Unfortunately, the Hunley was lost with all hands shortly after her attack but she opened the way for the future of underwater warfare.
5. The Hand grenade
While grenades were not a new invention to the American Civil War, improvements to their design and function radically changed the way they could be used. Prior to this time, grenades had fuses that had to be lit before being thrown and so were only used by special troops known as grenadiers. Other times grenades were closer to Molotov Cocktails than what would commonly be called a grenade.
William Ketchum designed a new grenade that would detonate on impact.
His design consisted of a metal cylinder with a plunger on the nose that would cause the explosives inside to detonate when it landed. To ensure that it landed nose down, he attached a wooden tailpiece with four fins to stabilize the grenade. With this type of fuse, individual soldiers of any type could carry the grenades.
This meant infantry assaulting trenches and other enemy positions could carry grenades while still carrying their rifles. By the 20th century, all major militaries adopted the hand grenade for standard infantry use.