republic and early empire often carried two pila, with one sometimes being lighter than the other. Standard tactics called for a Roman soldier to throw his pilum (both if there was time) at the enemy just before charging to engage with his gladius. Some pila had small hand-guards, to protect the wielder if he intended to use it as a melee weapon, but it does not appear that this was common. Late Empire In the late Roman Empire, the Roman infantry came to use a differently-shaped javelin from the earlier pilum. This javelin was lighter and had a greater range. Called a plumbata, it resembled a thick stocky arrow, fletched with leather vanes to provide stability and rotation in flight (which increased accuracy). To overcome its comparatively small mass, the plumbata was fitted with an oval-shaped lead weight socketed around the shaft just forward of the center of balance, giving the weapon its name. Even so, plumbatae were much lighter than pila, and would not have had the armour penetration or shield transfixing capabilities of their earlier counterparts. Two or three plumbatae were typically clipped to a small wooden bracket on the inside of the large oval or round shields used at the time. Massed troops would unclip and hurl plumbatae as the enemy neared, hopefully stalling their movement and morale by making them clump together and huddle under their shields. With the enemy deprived of rapid movement and their visibility impaired by their own raised shields, the Roman troops were then better placed to exploit the tactical situation. It is unlikely plumbatae were viewed by the Romans as the killing blow, but more as a means of stalling the enemy at ranges greater than previously provided by the heavier and shorter ranged pilum. Gaul The Gallic cavalry used to hurl several javelin volleys to soften the enemy before a frontal attack. The Gallic cavalry used their javelins in a tactic similar to that of horse archers' Parthian shot. The Gauls knew how to turn on horseback to throw javelins backwards while appearing to retreat. Iberia The Hispanic cavalry was a light cavalry armed with falcatas and several light javelins. The Cantabri tribes invented a military tactic to maximize the advantages of the combination between horse and javelin. In this tactic the horsemen rode around in circles, toward and away from the enemy, continually hurling javelins. The tactic was usually