Messengers now came in haste and alarm to inform Fabius Valens, how Otho's fleet was threatening the province of Gallia Narbonensis, which had sworn allegiance to Vitellius. Envoys from the colonies were already on the spot praying for aid. He despatched two cohorts of Tungrian infantry, four squadrons of horse, and all the cavalry of the Treviri under the command of Julius Classicus. Part of these troops were retained for the defence of the colony of Forum Julii, for it was feared, that if the whole army were sent by the route through the interior, the enemy's fleet might make a rapid movement on the unprotected coast. Twelve squadrons of cavalry and some picked infantry advanced against the enemy; they were reinforced by a cohort of Ligurians, an auxiliary local force of long standing, and five hundred Pannonians, not yet regularly enrolled. The conflict commenced without delay, the enemy's line of battle being so arranged, that part of the levies from the fleet, who had a number of rustics among their ranks, were posted on the slope of the hills which border on the coast, the Prætorians fully occupying the level ground between the hills and the shore, while on the sea was the fleet, moored to the land and ready for action, drawn up in line so as to present a formidable front. The Vitellianists whose infantry was inferior, but who were strong in cavalry, stationed the mountaineers on the neighbouring heights, and their infantry in close ranks behind the cavalry. The squadrons of the Treveri charged the enemy incautiously, and found themselves encountered in front by the veteran troops, while on the flanks they were also an- noyed by showers of stones from the rustic band, who were skilful throwers, and who, mixed up as they were among the regular soldiers, whether cowardly or brave, were all equally bold in the moment of victory. The general consternation of the Vitellianists was increased by a new alarm as the fleet attacked the rear of the combatants. By this movement they were hemmed in on all sides, and the whole force would have perished, had not the shades of night checked the advance of the victorious army, and covered the retreat of the vanquished.