The Helvetians continued their march, Cæsar following at a distance, watching for an opportunity of attacking them. At Bibracte, an important city of Gaul (now Mont Beuvray), west of Autun in Burgundy, the opportunity offered itself. Cæsar seized a hill and posted his troops there, and charged the enemy with his cavalry. The Helvetians fiercely repulsed the attack, and poured on the Roman front, but were quite unable to stand against the showers of the Roman pila, which often penetrated several shields at once, and thus fastened them together so that they could not be disentangled. Disconcerted by this unexpected result, the Helvetians were soon discomfited by the sharp attack with swords which instantly followed. Retiring for a while to a hill close by, the barbarians again drew up in battle order, and again descended to combat. Long and fierce was the struggle which followed; the Helvetians fighting like lions till the evening, never once turning their backs on the enemy. This is Cæsar's own report. But barbarian heroism was no match for the regular, well-organized, and highly-trained Roman army, and once more driven back, they withdrew to the hill where had been left their wives and children with the baggage. From this place they ventured to make a last resistance, and they drew up their carts in the form of a deep square, leaving room in the middle for the non-combatants and the baggage. Then mounting their extemporized fort--the so-called Wagenburg--the Helvetian men commenced the fray, even their women and children hurling javelins at the enemy. Not till midnight did the Romans seize and enter on the rude rampart, and when they did the clashing of arms had ceased. All the valiant defenders lay slain at their feet, and the spirit of bold independence of the Helvetians was crushed for ever.