The first metal cannon was the pot-de-fer. Loaded with an arrow-like bolt that was probably wrapped in leather to allow greater thrusting power, it was set off through a touch hole with a heated wire.
History of Artillery and The Cannon
Richmond Howitzers
The history of cannon spans several hundred years. First used in China, they were among the earliest forms of gunpowder artillery, and over time replaced siege enginesamong other forms of aging weaponryon the battlefield. The first cannon in Europe were probably used in Iberia, during the Islamic wars against Spain, in the 13th century; their use was also first documented in the Middle East around this time. English cannon were first used during the Hundred Years' War, at the Battle of Crécy, in 1346. It was during this period, the Middle Ages, that cannon became standardized, and more effective in both the anti-infantry and siege roles. After the Middle Ages, most large cannon were abandoned, in favor of greater numbers of lighter, more maneuverable pieces. In addition, new technologies and tactics were developed, making most defenses obsolete; this led to the construction of star forts, specifically designed to withstand bombardment from artillery.
Cannon also transformed naval warfare: the Royal Navy, in particular, took advantage of their firepower. As rifling became more commonplace, the accuracy of cannon was significantly improved, and they became deadlier than ever, especially to infantry. In World War I, a considerable majority of all deaths were caused by cannon; they were also used widely in World War II. Most modern cannon are similar to those used in the Second World War,including autocannon,with the exception of naval guns, which are now significantly smaller in caliber
The earliest known cannon was invented by Ctesibius of Alexandria, in the 3rd century BC. Little is known about this primitive inventionas most of Ctesibius' works were lostbut it was noted by Philo of Byzantium that it operated using compressed air. One of the first cannon used in battle was the fire lance, a gunpowder-filled tube attached to the end of a spear and used as a flamethrower. Shrapnel was sometimes placed in the barrel, so that it would fly out along with the flames. Eventually, the paper and bamboo of which fire lance barrels were originally constructed came to be replaced by metal. The earliest known depiction of a firearm is a sculpture from a cave in Sichuan, dating to the 12th century, that portrays a figure carrying a vase-shaped bombard, firing flames and a cannonball. The oldest surviving gun, dated to 1288, has a muzzle bore diameter of 2.5 cm (1 in); the second oldest, dated to 1332, has a muzzle bore diameter of 10.5 cm (4 in).