Gun
Gun

Gun
!Battleship [USS Iowa) fires a full broadside) from its nine sixteen-inch naval guns](//upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Ussiowabb-61pr.jpg/250px-Ussiowabb-61pr.jpg)
Gun
The first devices identified as guns or proto-guns appeared in China from around AD 1000. By the end of the 13th century, they had become "true guns", metal barrel firearms that fired single projectiles which occluded the barrel. Gunpowder and gun technology spread throughout Eurasia during the 14th century.