The Gauls also founded towns, such as Mediolanum (Milan), Brixia (Brescia), Verona, Bononia (Bologna), Sena-Gallica (Sinigaglia), &c.

But for a long while they were no more than intrenched camps, fortified places, where the population shut themselves up in case of necessity.

"They, as a general rule, straggled about the country," says Polybius, the most correct and clear-sighted of the ancient historians, "sleeping on grass or straw, living on nothing but meat, busying themselves about nothing but war and a little husbandry, and counting as riches nothing but flocks and gold, the only goods that can be carried away at pleasure and on every occasion." During nearly thirty years the Gauls thus scoured not only Upper Italy, which they had almost to themselves, but all the eastern coast, and up to the head of the peninsula, encountering along the Adriatic, and in the rich and effeminate cities of Magna Graecia, Sybaris, Tarentum, Crotona, and Locri, no enemy capable of resisting them.

But in the year 391 B.C., finding themselves cooped up in their territory, a strong band of Gauls crossed the Apennines, and went to demand from the Etruscans of Clusium the cession of a portion of their lands.

The only answer Clusium made was to close her gates.