19His second war, directly in defence of the Gauls, was against the Germans,31Cf. Caesar, B. G. i. 30-53. although previously, in Rome, he had made their king Ariovistus an ally.32Acting as consul, in 59 B.C. But they were intolerable neighbours of Caesar’s subjects, and if an opportunity presented itself it was thought that they would not remain quietly in their present homes, but would encroach upon and occupy Gaul.