I. The disturbed state of Gaul and the loss of fifteen cohorts at Tongres obliged Cæsar to augment his army; he raised two legions in the Cisalpine, and asked for a third from Pompey. Again at the head of ten legions, Cæsar, with his usual activity, hastened to repress the incipient insurrections. From the Scheldt to the Rhine, from the Seine to the Loire, most of the peoples were in arms. Those of Trèves had called the Suevi to their assistance. Without waiting for the end of winter, Cæsar brought together four legions at Amiens, and, falling unexpectedly upon the peoples of Hainault, forced from them a speedy submission. Then he convoked in this latter town the general assembly of Gaul; but the peoples of Sens, Orleans, and Trèves did not repair to it. He then transferred the assembly to Paris, and afterwards marched upon Sens, where his appearance sufficed to pacify not only that country, but also that of Orleans. Having thus appeased in a short time the troubles of the north and centre of Gaul, he directed all his attention towards the countries situated between the Rhine and the Meuse, where Ambiorix continued to excite revolt. He was impatient to avenge upon him the defeat of Sabinus; but, to make more sure of overtaking him, he resolved first to make two expeditions, one into Brabant, the other into the country of Trèves, and in this manner to cut off that chieftain from all retreat, either on the side of the north, or on the side of the east, where the Germans were. He advanced in person towards Brabant, which he soon reduced to obedience. During this time, Labienus gained, on the banks of the Ourthe, a great victory over the inhabitants of the country of Trèves. At the news of this defeat, the Germans, who had already crossed the Rhine, returned home. Cæsar rejoined Labienus on the territory of Trèves, and, determined to chastise the Suevi, he a second time crossed the Rhine, near Bonn, a little above the place where he had built a bridge two years before. After compelling the Suevi to take refuge in the interior of their territory, he returned to Gaul, caused a part of the bridge to be cut, and left a strong garrison on the left bank. [Sidenote: Pursuit of Ambiorix.]