 According to Polybius' account, the Boii and Insubres of Cisalpine Gaul paid the Gaesatae, under their leaders Concolitanus and Aneroëstes, large sums of money to fight against the Romans, in response to the Roman colonisation of the former Gallic territory of Picenum.The Gauls overran and defeated a Roman army on the approach to Rome, but when the consul Lucius Aemilius Papus arrived with his troops, the Gauls followed Aneroëstes' advice to withdraw with their booty.Papus pursued them, and the other consul Gaius Atilius Regulus cut them off at Telamon in Etruria.