II. Cæsar could judge, from this information, the formidable character of the league which he had now to combat. His first care was to try to divide the hostile forces, and, with this view, he induced Divitiacus, in spite of the friendly relations which had long united the Ædui with the Bellovaci, to invade and ravage the territory of the latter with the Æduan troops. He then required the senate of the Remi to repair to his presence, and the children of the _principes_ to be brought to him as hostages; and then, on information that Galba was marching to meet him, he resolved to move to the other side of the Aisne, which crossed the extremity of the territory of the Remi (_quod est in extremis Remorum finibus_),[244] and encamp there in a strong position, to await the enemy’s attack. The road he had hitherto followed led straight to the Aisne, and crossed it by a bridge at the spot where now stands the village of Berry-au-Bac. (_See Plate 7._) He marched in great haste towards this bridge, led his army across it, and fixed his camp on the right side of the road, on the hill situated between the Aisne and the Miette, a small stream with marshy banks, which makes a bend in that river between Berry-au-Bac and Pontavert. (_See Plate 8._) This hill, called Mauchamp, is of small elevation (about 25 mètres) above the valley of the Aisne, and in its length, from east to west, it presents sufficient space for the Roman army to deploy. Laterally, it sinks to the level of the surrounding ground by slight undulations, and the side which looks upon the Miette descends by a gentle slope towards the banks of the stream. This position offered several advantages: the Aisne defended one side of the camp; the rear of the army was protected, and the transports of provisions could arrive in safety through the countries of the Remi and other friendly peoples. Cæsar ordered a work to be constructed on the right bank of the Aisne, at the extremity of the bridge, where he established a post (_see Plates 8 and 9_),[245] and he left on the other side of the river the lieutenant Q. Titurius Sabinus with six cohorts. The camp was surrounded by a retrenchment twelve feet high, and by a fosse eighteen feet wide.[246]