Strabo Geography 3.3.8

[8] The rough and savage manners of these people is not alone owing to their wars, but likewise to their isolated position, it being a long distance to reach them, whether by sea or land. Thus the difficulty of communication has deprived them both of generosity of manners and of courtesy. At the present time, however, they suffer less from this both on account of their being at peace and the intermixture of Romans. Wherever these [influences] are not so much experienced people are harsher and more savage. It is probable that this ruggedness of character is increased by the barrenness of the mountains and some of the places which they inhabit. At the present day, as I have remarked, all warfare is put an end to, Augustus Caesar having subdued the Cantabrians ¹ and the neighbouring nations, amongst whom the system of pillage was mainly carried on in our day. So that at the present time, instead of plundering the allies of the Romans, the Coniaci and those who dwell by the sources of the Ebro, ² with the exception of the Tuisi, ³ bear arms for the Romans. Tiberius, who succeeded Augustus Caesar, carried out his intention of placing a military force of three legions in these parts, by which means he has not only preserved peace, but introduced amongst some of them a civil polity.