in battles and ceremonies. In earlier encounters with the Romans such as the Battle of Sentinum, some Celts would employ the chariot. Although chariots had fallen out of use in continental Europe from the end of the 3rd century BC, Caesar found that they remained significant in Brittonic warfare. If his descriptions are to be believed, he encountered in Britain an army in transition, possessing cavalry but still with an elite fighting from chariots. He describes how these warriors would throw javelins from their vehicles before abandoning them to fight on foot and returning to them in order to retreat or redeploy. Cavalry proper is described as used for skirmishing. Gauls are said to have commented that they themselves had formerly used chariots but had abandoned them by this time. Their mode of fighting with their chariots is this: firstly, they drive about in all directions and throw their weapons and generally break the ranks of the enemy with the very dread of their horses and the noise of their wheels; and when they have worked themselves in between the troops of horse, leap from their chariots and engage on foot. The charioteers in the meantime withdraw a little distance from the battle, and so place themselves with the chariots that, if their masters are overpowered by the number of the enemy, they may have a ready retreat to their own troops. Thus they display in battle the speed of horse, [together with] the firmness of infantry. Mercenaries Celtic warriors served as mercenaries in many of the great armies of the Classical period. Some of the best known were those who joined Carthage and Hannibal in his invasion of the Italian peninsula during the Second Punic war and who contributed to his victories in Lake Trasimene and at the Battle of Cannae. Celtic mercenaries notably fought for the Romans against the Parthians at the Battle of Carrhae. The Roman cavalry, composed primarily of Gallic horsemen, fought bravely and held their own against the Cataphracts but the inferiority in armor and equipment was evident and contributed to their defeat. Celtic warriors would often fight for various powers as mercenaries throughout Classical antiquity such as the Romans, Greeks, Carthaginians and Macedonians. When a branch of Brennus' Balkan expedition turned East and crossed the Hellespont, they founded a Celtic-ruled state in Asia Minor known as Galatia. Galatia became well known as a source