The Gaesatae, then, having collected their forces, crossed the Alps and descended into the valley of the Padus with a formidable army, furnished with a variety of armour, in the eighth year after the distribution of the lands of Picenum. The Insubres and Boii remained loyal to the agreement they had made with them: but the Venĕti and Cenomani being induced by embassies from Rome to take the Roman side, the Celtic kings were obliged to leave a portion of their forces behind, to guard against an invasion of their territory by those tribes. They themselves, with their main army, consisting of one hundred and fifty thousand foot, and twenty thousand horse and chariots, struck camp and started on their march, which was to be through Etruria, in high spirits. As soon as it was known at Rome that the Celts had crossed the Alps, one of the Consuls, Lucius Aemilius Papus, was sent with an army to Ariminum to guard against the passage of the enemy, and one of the Praetors into Etruria: for the other Consul, Gaius Atilius Regulus, happened to be in Sardinia with his legions. There was universal terror in Rome, for the danger threatening them was believed to be great and formidable. And naturally so: for the old fear of the Gauls had never been eradicated from their minds. No one thought of anything else: they were incessantly occupied in mustering the legions, or enrolling new ones, and in ordering up such of the allies as were ready for service. The proper magistrates were ordered to give in lists of all citizens of military age; that it might at once be known to what the total of the available forces amounted. And such stores of corn, and darts, and other military equipments were collected as no one could remember on any former occasion. From every side assistance was eagerly rendered; for the inhabitants of Italy, in their terror at the Gallic invasion, no longer thought of the matter as a question of alliance with Rome, or of the war as undertaken to support Roman supremacy, but each people regarded it as a danger menacing themselves and their own city and territory. The response to the Roman appeal therefore was prompt.