[Sidenote: Cæsar augments his Army.] I. The state of Gaul gave Cæsar cause to anticipate serious agitations, and he felt convinced of the necessity of new levies. He employed on this mission his lieutenants M. Silanus, C. Antistius Reginus, and T. Sextius; at the same time he asked Pompey, who had remained before Rome with the _imperium_, in order to watch over the public interests, to recall to their colours and send him the soldiers of Cisalpine Gaul enlisted under the consulate of the latter in 699. Cæsar attached, with a view to the present and to the future, great importance to giving the Gauls a high idea of the resources of Italy, and to proving to them that it was easy for the Republic, after a check, not only to repair its losses, but also to bring into the field troops more numerous than ever. Pompey, through friendship and consideration for the public good, granted his demand. Thanks to the activity of his lieutenants, before the end of winter three new legions (or thirty cohorts) were raised and joined to the army: the 1st, the 14th, which had just taken the number of the legion annihilated at Aduatuca, and the 15th. In this manner, the fifteen cohorts lost under Sabinus were replaced by double their number, and it was seen, by this rapid display of forces, what was the power of the military organization and resources of the Roman people. It was the first time that Cæsar commanded ten legions. [Sidenote: War against the Nervii, General Assembly of Gaul.] II. After the death of Indutiomarus, the Treviri took for their chiefs some members of his family. These in vain urged the nearest peoples of the right bank of the Rhine to make common cause with them; but they succeeded with some of the more distant tribes, particularly the Suevi, and persuaded Ambiorix to enter into their league. From all parts, from the Rhine to the Scheldt, were announced preparations for war. The Nervii, the Aduatuci, the Menapii, all the Germans on this side of the Rhine, were in arms. The Senones persisted in their disobedience, and acted in concert with the Carnutes and the neighbouring states; everything urged upon Cæsar the counsel to open the campaign earlier than usual. Accordingly, without waiting for the end of winter, he concentrates the four legions nearest to Amiens, his head-quarters (those of Fabius, Crassus, Cicero, and Trebonius), invades unexpectedly the territory of the Nervii, gives them time neither to assemble nor to fly, but carries off the men and cattle, abandons the booty to the soldiers, and forces this people to submission.