Titus Livius (Livy), The History of Rome, Book 34
Evan T. Sage, Ph.D. Professor of Latin and Head of the Department of Classics in the University of Pittsburgh, Ed.

20. With this small force he captured several towns. The Sedetani, the Ausetani, and the Suessetani came over to him. [2] The Lacetani, a remote and forest-dwelling race, were kept under arms, partly by their native savageness, partly by their consciousness of having pillaged the allies in sudden raids while the consul and the army were engaged in the campaign in Turdetania. [3] Therefore the consul led to the attack upon their citadel not only the Roman cohorts but the young men of the allies, who were justly incensed at them. [4] Their town was long, but was not extensive in breadth in proportion. He halted at a distance of about four hundred paces from it. [5] There he left a guard of chosen cohorts, ordering them not to stir from that place until he came to them in person; the rest of the troops he led to the farther side of the town. The largest contingent among all his auxiliaries was furnished by the young men of the Suessetani; these he ordered to assault the wall. [6] When the Lacetani recognized their arms and standards, and recalled how often they had offered them insults with impunity in their own lands and how often they had routed them and put them to flight in pitched battle, they suddenly threw open the gate and attacked them in a body. The Suessetani scarcely waited for them to raise the shout, much less for them to charge. [7] When the consul saw that this was turning out [8] as he had expected it would, he put spurs to his horse and rode off under the enemy's wall to the [p. 469]cohorts, and bringing them into action, since the¹ enemy had all [9] scattered to pursue the Suessetani, he led them into the city on the side where all was silence and solitude and was in complete control before the Lacetani returned. Having nothing left to them but their arms, they presently surrendered.