Roman Gladius, sword that conquered the known world.
Gladius types (top to bottom): 1. Mainz 2. Mainz-Fulham 3. Pompeii
Livy XXXI 34.4: For men who had seen the wounds dealt by javelins and arrows and occasionally by lances, since they were used to fighting with the Greeks and Illyrians, when they had seen bodies chopped to pieces by the Spanish sword,1 arms torn away, shoulders and all, or heads separated from bodies, with the necks completely severed, or vitals laid open, and the other fearful wounds, realized in a general panic with what weapons and what men they had to fight.
Vegetius 1.12: Recruits learned to strike with the point not with the edge. For the Romans not only defeated easily those who used the edge but indeed despised them. A cut, with whatever strength it is delivered, rarely kills since the vital organs are protected by armor and by bones. By contrast, a stab wound driven in only two inches is fatal, since it is inevitable that anything driven in will pierce the vital organs. Furthermore, when a cut is being delivered the right arm and side are exposed. But a stab is delivered with the body protected and the enemy is wounded before he notices. It is accepted that this is why the Romans principally use this method of fighting.