Field artillery in the American Civil War
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Field artillery in the American Civil War refers to the important artillery weapons, equipment, and practices used by infantry and cavalry forces in the field. It does not include heavy artillery, use in fixed fortifications, or coastal or naval artillery.
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[edit] Weapons
The principal guns widely used in the field are listed in the table below. There were two general types of artillery weapons used during the Civil War: smoothbores and rifles. Smoothbores included howitzers and cannons.
- Howitzers
- Short-barreled guns that were typically used for firing explosive shells in a high trajectory, but also for spherical case shot and canister. They were easier to transport because of their lighter weight, but they suffered from a shorter range than cannons and were not as flexible. The primary users of howitzers during the Civil War were some Confederate forces, particularly cavalry.
- Cannons
- While heavier, cannons were more flexible because they could fire shells and canister, and solid shot. Their trajectory was flatter and longer-range than a howitzer's. By far the most popular of the smoothbore cannons was the 12-pounder Napoleon, which was sometimes called, confusingly, a "gun-howitzer" (because it possessed characteristics of both).
- Rifled guns
- Adding rifling to a gun tube made it more difficult and expensive to manufacture and increased the length of the tube, but it increased the range and accuracy of the piece. While most of the rifled guns in the Civil War were muzzle-loaded, a small number of breech-loaded guns were used.
| Name | Tube | Projectile (lb) | Charge (lb) | Velocity (ft/s) | Range (yd at 5°) | |||
|---|---|---|---|---|---|---|---|---|
| Material | Bore (in) | Len (in) | Wt (lb) | |||||
| M1857 12-pounder "Napoleon" | bronze | 4.62 | 66 | 1,227 | 12.3 | 2.50 | 1,440 | 1,619 |
| 12-pounder Howitzer | bronze | 4.62 | 53 | 788 | 8.9 | 1.00 | 1,054 | 1,072 |
| 24-pounder Howitzer | bronze | 5.82 | 64 | 1,318 | 18.4 | 2.00 | 1,060 | 1,322 |
| 10-pounder Parrott rifle | iron | 2.9 or 3.0 |
74 | 890 | 9.5 | 1.00 | 1,230 | 1,850 |
| 3-inch Ordnance Rifle | wrought iron |
3.0 | 69 | 820 | 9.5 | 1.00 | 1,215 | 1,830 |
| 20-pounder Parrott rifle | iron | 3.67 | 84 | 1750 | 20.0 | 2.00 | 1,250 | 1,900 |
| 12-pounder Whitworth breechloading rifle | iron | 2.75 | 104 | 1092 | 12.0 | 1.75 | 1,500 | 2,800 |
[edit] 12-pounder Napoleon
The Napoleon was the most popular smoothbore cannon used during the war. It was named after Napoleon III of France and was widely admired because of its safety, reliability, and killing power, especially at close range. It was the last cast bronze gun used by an American army. The Federal version of the Napoleon can be recognized by the flared front end of the barrel, called the muzzle-swell, whereas Confederate-manufactured Napoleons had straight barrels.
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[edit] 3-inch ordnance rifle
The 3-inch ordnance rifle was the most widely used rifled gun during the war. Invented by John Griffen, it was extremely durable, with the barrel made of wrought iron, primarily produced by the Phoenixville Iron Company. There are few cases on record of the tube fracturing or bursting, a problem that plagued other rifles made of brittle cast iron. The rifle had exceptional accuracy. During the Battle of Atlanta, a Confederate gunner was quoted: "The Yankee three-inch rifle was a dead shot at any distance under a mile. They could hit the end of a flour barrel more often than miss, unless the gunner got rattled."
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[edit] Parrott rifles
Parrotts, invented by Robert Parker Parrott, were manufactured in different sizes, from 10-pounders up to the rare 300-pounder. The 10- and 20-pounder versions were used by both armies in the field. The smaller size was much more prevalent; it came in two bore sizes: 2.9 inch and 3.0 inch. Confederate forces used both bore sizes during the war, which added to the complication of supplying the appropriate ammunition to its batteries. Until 1864, Union batteries used only the 2.9-inch. The M1863, with a 3-inch bore, had firing characteristics similar to the earlier model; it can be recognized by its straight barrel, without muzzle-swell.
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Parrotts were manufactured with a combination of cast iron and wrought iron. The cast iron made for an accurate gun but was brittle enough to suffer fractures. On the Parrott, a large wrought iron reinforcing band was overlaid on the breach. Although accurate, the Parrott had a poor reputation for safety, and they were shunned by many artillerists. (At the end of 1862, Henry J. Hunt attempted to get the Parrott eliminated from the Army of the Potomac's inventory.) The 20-pounder was the largest field gun used during the war, with the barrel alone weighing over 1,800 pounds (800 kg).
[edit] Whitworth
The Whitworth, designed by Joseph Whitworth and manufactured in England, was a rare gun during the war, but was an interesting precursor to modern artillery in that it was loaded from the breech and had exceptional accuracy over great distance. An engineering magazine wrote in 1864 that, "At 1600 yards the Whitworth gun fired 10 shots with a lateral deviation of only 5 inches." This degree of accuracy made them effective in counter-battery fire, used almost as the equivalent of a sharpshooter's rifle, and also for firing over bodies of water. They were not popular as anti-infantry weapons. It had a caliber of 2.75 inches. The bore was hexagonal in cross-section, and the was projectile a long bolt that twisted to conform to the rifling. It is said that these bolts made a very eerie sound when fired, which could be distinguished from other projectiles.[2]
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[edit] Ammunition
Ammunition came in wide varieties, designed to attack specific targets.
- Shot (or bolt)
- Shot was a solid projectile that included no explosive charge. For a smoothbore, the projectile was a round "cannonball". For a rifled gun, the projectile was referred to as a bolt and had a cylindrical or spherical shape. In both cases, the projectile was used to impart kinetic energy for a battering effect, particularly effective for the destruction of enemy guns, limbers, caissons, and wagons. It was also effective for mowing down columns of infantry and cavalry and had psychological effects against its targets. Despite its effectiveness, many artillerymen were reluctant to use solid shot, preferring the explosive types of ordnance. With solid projectiles, accuracy was the paramount consideration, and they also caused more tube wear than their explosive counterparts.
- Shell
- Shells included an explosive charge and were designed to burst into a small number of pieces (six or fewer) just over the heads of enemy infantry or artillery. For smoothbores, the projectile was referred to as "spherical shell". Shells were more effective against troops behind obstacles, and they were good for destroying wooden buildings by setting them on fire.
- Case (or shrapnel)
- Case (or "spherical case" for smoothbores) projectiles also carried an explosive charge but were more destructive than shells. The projectile was loaded with lead or iron balls that were designed to burst above and before the enemy line, showering down small but destructive projectiles on the enemy. The spherical case used in a 12-pounder Napoleon contained 78 balls. The name shrapnel derives from its inventor, Henry Shrapnel.
- Canister
- Canister shot was the deadliest type of ammunition, consisting of a thin metal container loaded with layers of lead or iron balls packed in sawdust. Upon exiting the muzzle, the container disintegrated, and the balls fanned out as the equivalent of a shotgun blast. The effective range of canister was only 400 yards, but within that range dozens of enemy infantrymen could be mowed down. Even more devastating was "double canister", generally used only in dire circumstances, where two containers of balls were fired simultaneously.
- Grapeshot
- Grapeshot was the predecessor of, and a variation on, canister, in which a smaller number of larger metal balls were arranged on stacked iron plates with a threaded bolt running down the center to hold them as a unit inside the barrel. A grapeshot round (or "stand") used in a 12-pounder Napoleon contained 9 balls, contrasted against the 27 smaller balls in a canister round.
A typical Union artillery battery (armed with six 12-pounder Napoleons) carried the following ammunition going into battle: 288 shot, 96 shells, 288 spherical case, and 96 canister.[3]
[edit] Equipment
The most pervasive piece of artillery equipment was the horse.
- Horse
- Horses were required to pull the enormous weight of the cannons and ammunition; on average, each horse pulled about 700 pounds (300 kg). Each gun in a battery used two six-horse teams: one team pulled a limber that towed the gun, the other pulled a limber that towed a caisson. The large number of horses posed a logistical challenge for the artillery, because they had to be fed, maintained, and replaced when worn out or injured. Artillery horses were generally selected second from the pool of high quality animals; cavalry mounts were the best horses. The life expectancy of an artillery horse was under eight months. They suffered from disease, exhaustion from long marches (typically 16 miles (25 km) in 10 hours), and battle injuries.
- Horses were larger targets than artillerymen when subjected to counter-battery fire, and their movements were made difficult because they were harnessed together into teams. Robert Stiles wrote about Union fire striking a Confederate battery on Benner's Hill at the Battle of Gettysburg:
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- Such a scene as it presented—guns dismounted and disabled, carriages splintered and crushed, ammunition chests exploded, limbers upset, wounded horses plunging and kicking, dashing out the brains of men tangled in the harness; while cannoneers with pistols were crawling around through the wreck shooting the struggling horses to save the lives of wounded men.
- The term "horse artillery" refers to the faster moving artillery batteries that typically supported cavalry regiments. The term "flying artillery" is sometimes used as well. In such batteries, the artillerymen were all mounted, in contrast to batteries in which the artillerymen walked alongside their guns.
- Limber
- The limber was a two-wheeled carriage that carried an ammunition chest. It was connected directly behind the team of six horses and towed either a gun or a caisson. In either case, the combination provided the equivalent of a four-wheeled vehicle, which distributed the load over two axles but was easier to maneuver on rough terrain than a four-wheeled wagon. The combination of a Napoleon gun and a packed limber weighed 3,865 pounds (1,750 kg).[4]
- Caisson
- The caisson was also a two-wheeled carriage. It carried two ammunition chests and a spare wheel. A fully loaded limber and caisson combination weighed 3,811 pounds (1729 kg).[4]
The limbers, caissons, and gun carriages were all constructed of oak. Each ammunition chest typically carried about 500 pounds (230 kg) of ammunition or supplies. In addition to these vehicles, there were also battery supply wagons and portable forges that were used to service the guns.
[edit] History and organization
[edit] Union artillery
The Union army entered the war with a strong advantage in artillery. It had ample manufacturing capacity in Northern factories, and it had a well-trained and professional officer corps manning that branch of the service. Brigadier General Henry J. Hunt, who was the chief of artillery for the Army of the Potomac for part of the war, was well recognized as a most efficient organizer of artillery forces, and he had few peers in the practice of the sciences of gunnery and logistics. Another example was John Gibbon, the author of the influential Artillerist's Manual published in 1863 (although Gibbon would achieve considerably more fame as an infantry general during the war). Shortly after the outbreak of war, Brig. Gen. James Wolfe Ripley, Chief of Ordnance, ordered the conversion of old smoothbores into rifled cannons and the manufacture of Parrott guns.
The basic unit of Union artillery was the battery, which usually consisted of six guns. Attempts were made to ensure that all six guns in a battery were of the same caliber, simplifying training and logistics. Each gun, or "piece", was operated by a gun crew of eight, plus four additional men to handle the horses and equipment. Two guns operating under the control of a lieutenant were known as a "section". The battery of six guns was commanded by a captain. Artillery brigades composed of five batteries were commanded by colonels and supported the infantry organizations as follows: each infantry corps was supported directly by one artillery brigade and, in the case of the Army of the Potomac, five brigades formed the Artillery Reserve. This arrangement, championed by Hunt, allowed artillery to be massed in support of the entire army's objective, rather than being dispersed all across the battlefield. An example of the tension between infantry commanders and artillery commanders was during the massive Confederate bombardment of Cemetery Ridge on July 3, 1863, the third day of the Battle of Gettysburg. Hunt had difficulty persuading the infantry commanders, such as Winfield S. Hancock, against using all of their artillery ammunition in response to the Confederate bombardment, understanding the value to the defenders of saving the ammunition for the infantry assault to come, Pickett's Charge.
At the start of the war, the U.S. Army had 2,283 guns on hand, but only about 10% of these were field artillery pieces. By the end of the war, the army had 3,325 guns, of which 53% were field pieces. The army reported as "supplied to the army during the war" the following quantities: 7,892 guns, 6,335,295 artillery projectiles, 2,862,177 rounds of fixed artillery ammunition, 45,258 tons of lead metal, and a 13,320 tons of gunpowder.
[edit] Confederate artillery
The South was at a relative disadvantage to the North for deployment of artillery. The industrial North had far greater capacity for manufacturing weapons, and the Union blockade of Southern ports prevented many foreign arms from reaching the Southern armies. The Confederacy had to rely to a significant extent on captured Union artillery pieces (either on the battlefield or by capturing armories, such as Harpers Ferry); it is estimated that two thirds of all Confederate field artillery was captured from the Union. Confederate cannons built in the South often suffered from the shortage of quality metals and shoddy workmanship. Another disadvantage was the quality of ammunition. The fuses needed for detonating shells and cases were frequently inaccurate, causing premature or delayed explosions. A Southern officer observed, "The combination of Yankee artillery with Rebel infantry would make an army that could be beaten by no one."
Confederate batteries usually consisted of four guns, in contrast to the Union's six. This was a matter of necessity, because guns were always in short supply. And, unlike the Union, batteries frequently consisted of mixed caliber weapons. Confederate batteries were generally organized into battalions (versus the Union brigades) of four batteries each, and the battalions were assigned to the direct support of infantry divisions. Each infantry corps was assigned two battalions as an Artillery Reserve, but there was no such Reserve at the army level. The chief of artillery for Robert E. Lee's Army of Northern Virginia, William N. Pendleton, had considerable difficulty massing artillery for best effect because of this organization and his personal incompetence.
[edit] Battles
Although virtually all battles of the Civil War included artillery, some battles are known better than others for significant artillery engagements, arguably critical to the overall outcome:
- Battle of Chancellorsville
- Battle of Stones River
- Battle of Fredericksburg
- Battle of Gettysburg
- Battle of Malvern Hill
[edit] Notable Civil War artillerists
Not nearly as well known as their infantry and cavalry counterparts, a small group of officers excelled at artillery deployment, organization, and the science of gunnery:
- Edward Porter Alexander
- Thomas H. Carter
- Alonzo Cushing
- John Gibbon (Artillerist's Manual)
- Henry Jackson Hunt
- Stonewall Jackson (artillery instructor before the war)
- Joseph W. Latimer
- Freeman McGilvery
- William Ransom Johnson Pegram
- John Pelham
- William N. Pendleton
- Charles S. Wainwright
- Reuben Lindsay Walker
[edit] See also
[edit] References
- Cole, Philip M., Civil War Artillery at Gettysburg, Da Capo Press, 2002, ISBN 0-306-81145-6.
- Eicher, David J., The Longest Night: A Military History of the Civil War, Simon & Schuster, 2001, ISBN 0-684-84944-5.
- Hazlett, James C., Olmstead, Edwin, Parks, M. Hume, Field Artillery Weapons of the American Civil War, rev. ed., University of Illinois Press, 1983, ISBN 0-252-07210-3.
- Nosworthy, Brent, The Bloody Crucible of Courage, Fighting Methods and Combat Experience of the Civil War, Carroll and Graf Publishers, 2003, ISBN 0-7867-1147-7.
- Pfanz, Harry W., Gettysburg: Culp's Hill and Cemetery Hill, University of North Carolina Press, 1993, ISBN 0-8078-2118-7.
- Thomas, Dean S., Cannons: An Introduction to Civil War Artillery, Thomas Publications, 1985, ISBN 0-939631-03-2.
[edit] Notes
[edit] External links
- Civil War Artillery websites: [1] [2] [3] [4]
- "Ring" of artillery websites
