To give ye courage and aid, I will order forth from the camp and place in battle array all our troops, and they will strike the enemy with terror." The Gallic horsemen cried out that they must all bind themselves by the most sacred of oaths, and swear that none of them would come again under roof, or see again wife, or children, or parent, unless he had twice pierced through the ranks of the enemy.

And all did take this oath, and so prepared for the attack.

Vercingetorix knew not that Caesar, with his usual foresight, had summoned and joined to his legions a great number of horsemen from the German tribes roving over the banks of the Rhine, with which he had taken care to keep up friendly relations.

Not only had he promised them pay, plunder, and lands, but, finding their horses ill-trained, he had taken those of his officers, even those of the Roman knights and veterans, and distributed them amongst his barbaric auxiliaries.

The action began between the cavalry on both sides; a portion of the Gallic had taken up position on the road followed by the Roman army, to bar its passage; but whilst the fighting at this point was getting more and more obstinate, the German horse in Caesar's service gained a neighboring height, drove off the Gallic horse that were in occupation, and pursued them as far as the river, near which was Vercingetorix with his infantry.