VIII. The forces of the two armies opposed to each other in the battle of Bibracte were about equal, for Cæsar had six legions--the 10th, which he had found in the Roman province; the three old legions (7th, 8th, and 9th), which he had brought from Aquileia; and the two new ones (11th and 12th), raised in the Cisalpine. The effective force of each must have been near the normal number of 6,000 men, for the campaign had only begun, and their ranks must have been increased by the veterans and volunteers of whom we have spoken in the first volume (page 456). The number of the legionaries was thus 36,000. Adding 4,000 cavalry, raised in the Roman province and among the Ædui, and probably 20,000 auxiliaries,[196] we shall have a total of 60,000 combatants, not including the men attached to the machines, those conducting the baggage, the army servants, &c. The Helvetii, on their side, did not count more than 69,000 combatants, since, out of 92,000, they had lost one-fourth near the Saône. In this battle, it must be remarked, Cæsar did not employ the two legions newly raised, which remained to guard the camp, and secure the retreat in case of disaster. Next year he assigned the same duty to the youngest troops. The cavalry did not pursue the enemies in their rout, doubtless because the mountainous nature of the locality made it impossible for it to act. CHAPTER IV. CAMPAIGN AGAINST ARIOVISTUS. (Year of Rome 696.) (BOOK I. OF THE “COMMENTARIES.”) [Sidenote: Seat of the Suevi and other German Tribes.] I. On the termination of the war against the Helvetii, the chiefs of nearly all Celtic Gaul went to congratulate Cæsar, and thank him for having, at the same time, avenged their old injuries, and delivered their country from immense danger. They expressed the desire to submit to his judgment certain affairs, and, in order to concert matters previously, they solicited his permission to convoke a general assembly. Cæsar gave his consent.