Sword

Long battle knives
''What if instead of fixing a knife at the end of a stick, we made a knife with a blade long enough that you could use it directly into battle? What used to be impossible with mere stone tools now is with metal. It's heavier than wood, but its also more resistent. Sure it wouldnt be as long as a spear, but it would be able to cut enemies at any point of it lenght while still beeing able to thrust like a spear. This would open up more fighting techniques for skilled soldiers and would make for a great melee weapon, lighter and less encumbrant than spears.''

Potential Requirements

 * Produce Battleaxes.