[Sidenote: B.C. 53.] Thus amply reinforced, Caesar, before the grass had begun to grow, took the field against the tribes which were openly disaffected. The first business was to punish the Belgians, who had attacked Cicero. He fell suddenly on the Nervii with four legions, seized their cattle, wasted their country, and carried off thousands of them to be sold into slavery. Returning to Amiens, he again called the chiefs about him, and, the Seine tribes refusing to put in an appearance, he transferred the council to Paris, and, advancing by rapid marches, he brought the Senones and Carnutes to pray for pardon.[2] He then turned on the Treveri and their allies, who, under Ambiorix, had destroyed Sabinus. Leaving Labienus with the additional legions to check the Treveri, he went himself into Flanders, where Ambiorix was hiding among the rivers and marshes. He threw bridges over the dikes, burnt the villages, and carried off an enormous spoil, of cattle and, alas! of men. To favor and enrich the tribes that submitted after a first defeat, to depopulate the determinately rebellious by seizing and selling as slaves those who had forfeited a right to his protection, was his uniform and, as the event proved, entirely successful policy. The persuasions of the Treveri had failed with the nearer German tribes; but some of the Suevi, who had never seen the Romans, were tempted to adventure over and try their fortunes; and the Treveri were waiting for them, to set on Labienus, in Caesar's absence. Labienus went in search of the Treveri, tempted them into an engagement by a feigned flight, killed many of them, and filled his camp with prisoners. Their German allies retreated again across the river, and the patriot chiefs, who had gone with Induciomarus, concealed themselves in the forests of Westphalia. Caesar thought it desirable to renew the admonition which he had given the Germans two years before, and again threw a bridge over the Rhine at the same place where he had made the first, but a little higher up the stream. Experience made the construction more easy. The bridge was begun and finished in a few days, but this time the labor was thrown away. The operation itself lost its impressiveness by repetition, and the barrenness of practical results was more evident than before. The Sueves, who had gone home, were far away in the interior. To lead the heavily armed legions in pursuit of wild light-footed marauders, who had not a town which could be burned, or a field of corn which could be cut for food, was to waste their strength to no purpose, and to prove still more plainly that in their own forests they were beyond the reach of vengeance. Caesar drew back again, after a brief visit to his allies the Ubii, cut two hundred feet of the bridge on the German side, and leaving the rest standing with a guard to defend it, he went in search of Ambiorix, who had as yet eluded him, in the Ardennes. Ambiorix had added treachery to