Cannon

A cannon is any large tubular firearm designed to fire a heavy projectile over a considerable distance. The term can apply to a modern day rifled machine gun with a calibre of 20 mm or more (see autocannon).

History

The oldest evidence for the use of cannon is a relief carved by Buddhist monks in China in 1128, where a cannon is portrayed among other weapons of war. In the West, the use of cannon was first recorded in the battles of the early 14th century, for instance, at the siege of Metz in 1324, and by the English against the Scots in 1327. The earliest listing of firearms in an army inventory is in 1326. The new weapon's popularity is indicated by cannon being regarded "as common and familiar as any weapon" by 1350. The first cannon were of two types, small guns of cast bronze or larger, banded wrought iron cannon. Developments in gunpowder in the 1400s helped speed the military adoption of cannon. The actual effectiveness of these early weapons is not clear; battle reports of the time tend to exaggerate. However, it is undeniable that regardless of their (probably feeble) physical impact, early cannons, with their noise, smoke, and flames, had a terrifying psychological impact on horses or soldiers who had never encountered the weapons before.

Related Topics:
Metz - Bronze - Iron - Gunpowder - Psychological

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Early cannon did not always fire spherical projectiles. For smaller cannon, arrow-like rounds were used in the 14th century, sometimes with brass fin-stabilisers or inflammable heads. Initially, round shot was made of iron but was soon replaced by stone balls, particularly for larger pieces, due to the cost of metals in the 14th and 15th centuries. The round shot were sometimes covered in lead to reduce windage. For anti-personnel use, massed lead pellets were quickly adopted, but in extremis any small stones, nails, or iron scraps would be used as "hailshot".

Related Topics:
Lead - Windage - Anti-personnel

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The introduction of wheeled carriages for cannon did not occur until the 15th century. Prior to then the weapons were mounted on sturdy wooden frames. The largest siege bombards would be strapped down to large timber baulks on earthwork platforms and aimed either with the initial platform or by hammering wedges under the front. Timber props supporting thick wooden planks were positioned to absorb the recoil.

Related Topics:
Platform - Recoil

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In the 16th century the "Great Guns" were classified according to size, with such names as "cannon royal" (see Tsar Cannon), "demi-cannon", "culverin", "demi-culverin", "falcon", "falconer", "minion" etc., but by the 18th century they were classified by the weight of the round shot that they fired. Thus the demi-cannon was described as a 32-pounder (15 kg). Smaller guns included the 18-pound (8 kg) culverin, 12-pounders (5 kg), 9 pounders (4 kg) and 6-pounders (3 kg). The gun barrel was mounted on a wheeled carriage balanced on two "trunnions", the short metal projections on either side of the barrel invented by an unknown Dutchman. The angle of elevation could be altered by moving a wooden wedge under the rear end of the gun.

Related Topics:
Tsar Cannon - Demi-cannon - Culverin - Demi-culverin

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Shotguns were developed as essentially small cannons, having been first named in Kentucky in the 18th Century; their size, expressed in gauge, is expressed in the fraction of a pound that a round shot of a diameter equal to their barrel bore diameter would be. Hence, a 12 gauge shotgun has a bore that is equivalent in diameter to a round shot of lead weighing one-twelth of a pound. See gauge (bore diameter).

Related Topics:
Shotguns - Kentucky - Gauge

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The early big guns were built up from strips of wrought iron, heated until they glowed yellow, and then hammered together to weld them and form the barrel. Rings of iron were forced over the barrel to reinforce it. Smaller guns were cast in brass or bronze, using techniques used for centuries to produce statues. In the 16th century the Dutch developed cast iron cannon. In addition to the obvious implications for land-based artillery, the lighter weight of cast-iron cannon rendered shipboard artillery far more efficient and cost-effective. Cast-iron technology spread to England in 1543, where it grew to become a key element in the British rise to naval supremacy.

Related Topics:
Brass - Cast iron - 1543

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In the 18th and early 19th centuries, cannon occupied several roles. On the battlefield they were like modern-day machine guns, used to "thin out" an advancing group of the enemy. In a siege, larger cannon and mortars were used more like conventional artillery or medieval siege weapons, to knock holes in the defences.

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The development of the smooth bore muzzle-loaded cannon culminated in the inventions of John A. Dahlgren, the admiral who designed the heavy, cast-iron cannon fired from Union ships in the American Civil War. In 1862 John Gilleland invented a double barrelled cannon, which turned out to be a spectacular failure. The military use of cannon declined in the mid-19th century as fabrication technology improved enough to enable the rifling of gun barrels (which in turn required the introduction of breech loading, followed by a brief return to muzzle-loading) and the use of the far more destructive explosive shells.

Related Topics:
John A. Dahlgren - American Civil War - 1862 - Double barrelled cannon

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During the nineteenth century, artillery technology advanced at a very rapid rate, ensuring that by the beginning of the twentieth century, modern armies in Europe, America, and Japan were equipped with lethally accurate cannons. Artillery came to dominate the First World War, with approximately 7 million of the estimated 10 million worldwide casualties being caused by artillery shells. Artillery forced armies to construct elaborate trench systems, which became the enduring image of the war. During the Second World War, artillery became less important as battles had become highly mobilised, with bomber aircraft taking over the role of long-range cannons. Cannons in fortified positions, such as the Maginot Line and the Atlantic Wall, were increasingly unable to protect areas from infantry and tank attacks. The German "Big Bertha" guns, capable of firing shells from Occupied France across the English Channel, were technologically unsuitable as the cannon's rifling would too quickly wear away. The High-pressure gun, designed by German engineers to bombard London, was a spectacular failure.

Related Topics:
Nineteenth century - Twentieth century - First World War - Trench - Second World War - Bomber - Maginot Line - Atlantic Wall - Big Bertha - High-pressure gun

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