Gun Use of firearms
 Guns are the main weapons used by armies. In modern armies every soldier has a firearm as part of his or her equipment which they are taught to use and keep in good working order. Guns have been used by armies since about 900 AD when the Chinese began using cannons. Long barreled guns called muskets, that could be carried and used by one person, were used in China by the 1300s. Guns were not an important weapon in European armies until the 1600s.