VELLEIUS PATERCULUS, History of Rome
[II.XCVII] Sed, dum in hac parte imperii omnia geruntur prosperrime, accepta in Germania clades sub legato M. Lollio, homine in omnia pecuniae quam recte faciendi cupidiore et inter summam uitiorum dissimulationem uitiosissimo, amissaque legionis quintae aquila uocauit ab Vrbe in Gallias Caesarem. Cura deinde atque onus Germanici belli delegata Druso Claudio, fratri Neronis, adulescenti tot tantarumque uirtutum quot et quantas natura mortalis recipit uel industria perficit. Cuius ingenium utrum bellicis magis operibus an ciuilibus suffecerit artibus, in incerto est: morum certe dulcedo ac suauitas et aduersus amicos aequa ac par sui aestimatio inimitabilis fuisse dicitur; nam pulchritudo corporis proxima fraternae fuit. Sed illum magna ex parte domitorem Germaniae, plurimo eius gentis uariis in locis profuso sanguine, fatorum iniquitas consulem, agentem annum tricesimum, rapuit. Moles deinde eius belli translata in Neronem est: quod is sua et uirtute et fortuna administrauit peragratusque uictor omnes partes Germaniae sine ullo detrimento commissi exercitus, quod praecipue huic duci semper curae fuit, sic perdomuit eam ut in formam paene stipendiariae redigeret prouinciae. Tum alter triumphus cum altero consulatu ei oblatus est.
[2.97] But while everything was being successfully managed in the empire, a disaster received in Germany under Marcus Lollius the legate--he was a man who was ever more eager for money than for honest action, and of vicious habits in spite of his excessive efforts at concealment--and the loss of the eagle of the fifth legion, summoned Caesar from the city to the provinces of Gaul. The burden of responsibility for this war was then entrusted to Drusus Claudius, the brother of Tiberius, a young man endowed with as many great qualities as men's nature is capable of receiving or application developing. It would be hard to say whether his talents were the better adapted to a military career or the duties of civil life; at any rate, the charm and the sweetness of his character are said to have been inimitable, and also his modest attitude of equality among his friends. As for his personal beauty, it was second only to that of his brother.But, after accomplishing to a great extent the subjection of Germany, in which much blood of that people was shed on various battlefields, an unkind fate carried him off during his consulship in his thirtieth year. The burden of responsibility for this war was then transferred to Tiberius. He carried it on with his customary valor and good fortune, and after traversing every part of Germany in a victorious campaign, without any loss of the army entrusted to him--for he made this one of his chief concerns-- he so subdued the country as to reduce it almost to the status of a tributary province. He then received a second triumph, and a second consulship.