Titus Livius (Livy), The History of Rome, Book 40
Evan T. Sage, Ph.D. and Alfred C. Schlesinger, Ph.D., Ed.

53. Two days after the censors chose the senate, Quintus Fulvius the consul set out against the Ligurians, making his way with his army across the pathless mountains and crossing the pass of Ballista, and fought a pitched battle with the enemy; [2] he not only conquered them on the field but captured their camp the same day. Three thousand two hundred of the enemy and all this region of the Ligurians surrendered. [3] The consul transferred the surrendered to lands in the plains¹ and set garrisons over the mountains. Quickly, too, dispatches from the province came to Rome; a thanksgiving for three days was decreed because of these successes, and the praetors sacrificed forty full-grown victims in the course of the thanksgiving. [4] The other consul, Lucius Manlius, did nothing worth recording among the Ligurians. [5] The transalpine Gauls, three thousand in number, crossing into Italy and harrying no one in war, asked land from the consuls and the senate, that they might live in peace under the rule of the Roman people. [6] The senate ordered them to leave Italy, and instructed the consul Quintus Fulvius to search out and punish the leaders and proposers of the plan to cross the Alps.