5.
And lastly this route, which only leads over two mountain ridges, has
been from the earliest times the great military route from the Celtic
to the Italian territory. The Carthaginian army had thus in fact no
choice. It was a fortunate coincidence, but not a motive influencing
the decision of Hannibal, that the Celtic tribes allied with him in
Italy inhabited the country up to the Little St. Bernard, while
the route by Mont Genevre would have brought him at first into the
territory of the Taurini, who were from ancient times at feud with
the Insubres.

So the Carthaginian army marched in the first instance up the Rhone
towards the valley of the upper Isere, not, as might be presumed, by
the nearest route up the left bank of the lower Isere from Valence to
Grenoble, but through the "island" of the Allobroges, the rich, and
even then thickly peopled, low ground, which is enclosed on the north
and west by the Rhone, on the south by the Isere, and on the east
by the Alps. The reason of this movement was, that the nearest route
would have led them through an impracticable and poor mountain-
country, while the "island" was level and extremely fertile, and was
separated by but a single mountain-wall from the valley of the upper
Isere. The march along the Rhone into, and across, the "island"
to the foot of the Alpine wall was accomplished in sixteen days: it
presented little difficulty, and in the "island" itself Hannibal
dexterously availed himself of a feud that had broken out between two
chieftains of the Allobroges to attach to his interests one of the
most important of the chiefs, who not only escorted the Carthaginians
through the whole plain, but also supplied them with provisions, and
furnished the soldiers with arms, clothing, and shoes. But the
expedition narrowly escaped destruction at the crossing of the first
Alpine chain, which rises precipitously like a wall, and over which
only a single available path leads (over the Mont du Chat, near the
hamlet Chevelu). The population of the Allobroges had strongly
occupied the pass. Hannibal learned the state of matters early enough
to avoid a surprise, and encamped at the foot, until after sunset the
Celts dispersed to the houses of the nearest town; he then seized the
pass in the night Thus the summit was gained; but on the extremely
steep path, which leads down from the summit to the lake of Bourget,
the mules and horses slipped and fell. The assaults, which at