auls by the burden of winter quarters. Clear, however, as
this was, it was no less clear that it was now December, and that
under the course proposed the victory might perhaps be gained by Rome,
but would not be gained by the consul Tiberius Sempronius, who held
the sole command in consequence of Scipio's wound, and whose year of
office expired in a few months. Hannibal knew the man, and neglected
no means of alluring him to fight. The Celtic villages that had
remained faithful to the Romans were cruelly laid waste, and, when
this brought on a conflict between the cavalry, Hannibal allowed his
opponents to boast of the victory. Soon thereafter on a raw rainy
day a general engagement came on, unlocked for by the Romans. From
the earliest hour of the morning the Roman light troops had been
skirmishing with the light cavalry of the enemy; the latter slowly
retreated, and the Romans eagerly pursued it through the deeply
swollen Trebia to follow up the advantage which they had gained.
Suddenly the cavalry halted; the Roman vanguard found itself face to
face with the army of Hannibal drawn up for battle on a field chosen
by himself; it was lost, unless the main body should cross the stream
with all speed to its support. Hungry, weary, and wet, the Romans
came on and hastened to form in order of battle, the cavalry, as
usual, on the wings, the infantry in the centre. The light troops,
who formed the vanguard on both sides, began the combat: but the
Romans had already almost exhausted their missiles against the
cavalry, and immediately gave way. In like manner the cavalry gave
way on the wings, hard pressed by the elephants in front, and
outflanked right and left by the far more numerous Carthaginian horse.
But the Roman infantry proved itself worthy of its name: at the
beginning of the battle it fought with very decided superiority
against the infantry of the enemy, and even when the repulse of the
Roman horse allowed the enemy's cavalry and light-armed troops to turn
their attacks against the Roman infantry, the latter, although ceasing
to advance, obstinately maintained its ground. At this stage a select
Carthaginian band of 1000 infantry, and as many horsemen, under the
leadership of Mago, Hannibal's youngest brother, suddenly emerged from
an ambush in the rear of the Roman army, and fell upon the densely
entangled masses. The wings of the army and the rear ranks of the
Roman centre were broken up and scattered by
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