C. Julius Caesar, Gallic War

But Caesar, having summoned to him the principal persons of each state, in one case by alarming them, since he declared that he knew what was going on, and in another case by encouraging them, retained a great part of Gaul in its allegiance. The Senones , however, which is a state eminently powerful and one of great influence among the Gauls, attempting by general design to slay Cavarinus, whom Caesar had created king among them (whose brother, Moritasgus, had held the sovereignty at the period of the arrival of Caesar in Gaul, and whose ancestors had also previously held it), when he discovered their plot and fled, pursued him even to the frontiers [of the state], and drove him from his kingdom and his home; and, after having sent embassadors to Caesar for the purpose of concluding a peace, when he ordered all their senate to come to him, did not obey that command. So far did it operate among those barbarian people, that there were found some to be the first to wage war; and so great a change of inclinations did it produce in all, that, except the Aedui and the Remi, whom Caesar had always held in especial honor, the one people for their long standing and uniform fidelity toward the Roman people, the other for their late service in the Gallic war, there was scarcely a state which was not suspected by us. And I do not know whether that ought much to be wondered at, as well for several other reasons, as particularly because they who ranked above all nations for prowess in war, most keenly regretted that they had lost so much of that reputation as to submit to commands from the Roman people.