Plutarch Sertorius 6

[1] But presently Marius died; ¹ and shortly afterwards Cinna was murdered; ² and the younger Marius, against the wishes of Sertorius and contrary to the laws, assumed the consulship; ³ and such men as Carbo, Norbanus, and Scipio were unsuccessfully opposing Sulla’s advance upon Rome; and the cause of the popular party was being ruined and lost, partly through the cowardice and weakness of its generals, and partly by treachery;

[2] and there was no reason why Sertorius should remain to see matters go from bad to worse owing to the inferior judgement of those who had superior power. And finally, Sulla encamped near Scipio and made friendly overtures, assuming that peace was to be made, and proceeded to corrupt his army. ⁴ Sertorius warned Scipio of this plainly, but could not persuade him. At last, therefore, altogether despairing of the city, he set out for Spain, in order that, in case he should succeed in firmly establishing his power there, he might afford a refuge to those of his friends who were worsted at Rome.

[3]
  After encountering grievous storms in mountainous regions, he was asked by the Barbarians to pay them tribute and purchase his passage. His companions were indignant, and considered it a terrible thing for a Roman pro-consul to render tribute to pestilent Barbarians; but Sertorius made light of what they thought a disgrace, and with the remark that he was purchasing time, than which nothing is more precious to a man bent on great achievements, he pacified the Barbarians with money, and then hastened on and took possession of Spain.

[4] He found its peoples strong in numbers and in fighting men, and since the rapacity and insolence of the Roman officials sent thither from time to time had made them hostile to the empire in all its aspects, he tried to win them over, the chiefs by his personal intercourse with them, the masses by a remission of taxes. His greatest popularity, however, was won by ridding them of the necessity of furnishing quarters for soldiers; for he compelled his soldiers to build their winter-quarters in the suburbs of the cities, and he himself was first to pitch his tent there.

[5] However, he did not rely wholly on the goodwill of the Barbarians, but he armed all the Roman settlers of the country who were of military age, and by undertaking the construction of all sorts of engines of war and the building of triremes, kept the cities well in hand, being mild in the affairs of peace, but showing himself formidable by the preparations which he made against his enemies.