Swords are sharpened cold steel that have a hilt on them to stop another sword that is being used against you from hurting your hand. Swords became popular around the rise of the Roman empire, and they have been used ever since. They can be different colors and sizes, but they are all sharp. Knight carried them in the Middle Ages for fighting other knights, going on Crusades, or simply pillaging other nations for gold, silver, and other precious items.
Learn more about swords at this link: http://en.wikipedia.org/wiki/Sword
Learn more about swords at this link: http://en.wikipedia.org/wiki/Sword