After these reverses, the Gauls remained quiet and at peace with <a class="linkToPlace" target="_blank" href="/place?placename=Rome&groupId=935&placeId=1669">Rome</a> for forty-five years.
But when, as time went on, those who had actually witnessed the terrible struggle were no more, and a younger generation had taken their place, full of unreflecting passion and absolutely without experience of suffering or peril,
they began again, as was natural, to disturb the settlement, becoming exasperated against the Romans on the least pretext and inviting the Alpine Gauls to make common cause with them.
At first these advances were made secretly by their chiefs without the knowledge of the multitude;
so that when a force of Transalpine Gauls advanced as far as <a class="linkToPlace" target="_blank" href="/place?placename=Ariminum&groupId=362&placeId=691">Ariminum</a> the Boian populace were suspicious of them, and quarrelling with their own leaders as well as with the strangers, killed their kings, Atis and Galatus, and had a pitched battle with the other Gauls in which many fell on either side.
The Romans had been alarmed by the advance of the Gauls, and a legion was on its way; but, on hearing of the Gauls' self-inflicted losses, they returned home.
Five years after this alarm, in the consulship of Marcus Aemilius Lepidus, the Romans divided among their citizens the territory in <a class="linkToPlace" target="_blank" href="/place?placename=Gaul&groupId=598&placeId=1108">Gaul</a> known as Picenum, from which they had ejected the Senones when they conquered them.
Gaius Flaminius was the originator of this popular policy, which we must pronounce to have been, one may say, the first step in the demoralization of the populace, as well as the cause of the war with the Gauls which followed.
For what prompted many of the Gauls and especially the Boii, whose territory bordered on that of <a class="linkToPlace" target="_blank" href="/place?placename=Rome&groupId=935&placeId=1669">Rome</a>, to take action was the conviction that now the Romans no longer made war on them for the sake of supremacy and sovereignty, but with a view to their total expulsion and extermination.
Walbank Commentary