history of cannons

A cannon is any piece of artillery that uses gunpowder or other usually explosive-based propellants to launch a projectile. Cannon vary in caliber, range, mobility, rate of fire, angle of fire, and firepower; different forms of cannon combine and balance these attributes in varying degrees, depending on their intended use on the battlefield. they first appeared about 1230 B.C. in china and are still in use today.


http://en.wikipedia.org/wiki/Cannon