It were unnecessary to dwell on the details of the battle, which resembled that of Aix; besides, fought as it was in Italy and by none but Romans, it has but little to do with a history of Gaul. It has been mentioned only to make known the issue of that famous invasion, of which Gaul was the principal theatre. For a moment it threatened the very existence of the Roman Republic. The victories of Marius arrested the torrent, but did not dry up its source. The great movement which drove from Asia to Europe, and from eastern to western Europe, masses of roving populations, followed its course, bringing incessantly upon the Roman frontiers new comers and new perils. A greater man than Marius, Julius Caesar in fact, saw that to effectually resist these clouds of barbaric assailants, the country into which they poured must be conquered and made Roman. The conquest of Gaul was the accomplishment of that idea, and the decisive step towards the transformation of the Roman republic into a Roman empire. CHAPTER IV.----GAUL CONQUERED BY JULIUS CAESAR. Historians, ancient and modern, have attributed to the Roman Senate, from the time of the establishment of the Roman province in Gaul, a long-premeditated design of conquering Gaul altogether. Others have said that when Julius Caesar, in the year of Rome 696, (58 B C.) got himself appointed proconsul in Gaul, his single aim was to form for himself there an army devoted to his person, of which he might avail himself to satisfy his ambition and make himself master of Rome. We should not be too ready to believe in these far-reaching and precise plans, conceived and settled so long beforehand, whether by a senate or a single man. Prevision and exact calculation do not count for so much in the lives of governments and of peoples. It is unexpected events, inevitable situations, the imperious necessities of successive epochs, which most often decide the conduct of the greatest powers and the most able politicians. It is after the fair, when the course of facts and their consequences has received full development, that, amidst their tranquil meditations, annalists and historians, in their learned way, attribute everything to systematic plans and personal calculations on the part of the chief actors. There is much less of combination than of momentary inspiration, derived from circumstances, in the resolutions and conduct of political chiefs, kings, senators, or great men. From the time that discord and corruption had turned the Roman Republic into a bloody and tyrannical anarchy, the Roman Senate no longer meditated grand designs, and its members were preoccupied only with the question of escaping or avenging proscriptions. When Caesar procured for himself the government for five years of the Gauls, the fact was, that, not desiring to be a sanguinary dictator like Scylla, or a gala chieftain like Pompey, he went and sought abroad, for his own glory and fortune’s sake, in a war of general Roman