The Romans had good ground for keeping a watchful eye, from the time they met them, upon the Gauls, and for dreading them particularly.  At the time when they determined to pursue them into the mountains of Asia Minor, they were just at the close of a desperate struggle, maintained against them for four hundred years, in Italy itself; “a struggle,” says Sallust, “in which it was a question not of glory, but of existence, for Rome.”  It was but just now remarked that at the beginning of the sixth century before our era, whilst, under their chieftain Sigovesus, the Gallic bands whose history has occupied the last few pages were crossing the Rhine and entering Germany, other bands, under the command of Bellovesus, were traversing the Alps and swarming into Italy.  From 587 to 521 B.C. five Gallic expeditions, formed of Gallic, Kymric, and Ligurian tribes, followed the same route and invaded successively the two banks of the Po—­the bottomless river, as they called it.  The Etruscans, who had long before, it will be remembered, themselves wrested that country from a people of Gallic origin, the Umbrians or Ambrons, could not make head against the new conquerors, aided, may be, by the remains of the old population.  The well-built towns, the cultivation of the country, the ports and canals that had been dug, nearly all these labors of Etruscan civilization disappeared beneath the footsteps of these barbarous hordes that knew only how to destroy, and one of which gave its chieftain the name of Hurricane (Elitorius, Ele-Dov).  Scarcely five Etruscan towns, Mantua and Ravenna amongst others, escaped disaster.  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.  The Gauls formed up around the walls.  Clusium asked help from Rome, with whom, notwithstanding the rivalry between the Etruscan and Roman nations, she had lately been on good terms.  The Romans promised first their good offices with the Gauls, afterwards material support; and thus were brought face to face those two peoples, fated to continue for four centuries a struggle which was to be ended only by the complete subjection of Gaul.