On the other hand, all the Italian allies were released without ransom, and charged to report at home that Hannibal waged war not against Italy, but against Rome; that he promised to every Italian community the restoration of its ancient independence and its ancient boundaries; and that the deliverer was about to follow those whom he had set free, bringing release and revenge.

In fact, when the winter ended, he started from the valley of the Po to search for a route through the difficult defiles of the Apennines.

Gaius Flaminius, with the Etruscan army, was still for the moment at Arezzo, intending to move from that point towards Lucca in order to protect the vale of the Arno and the passes of the Apennines, so soon as the season should allow.
But Hannibal anticipated him.

The passage of the Apennines was accomplished without much difficulty, at a point as far west as possible or, in other words, as distant as possible from the enemy; but the marshy low grounds between the Serchio and the Arno were so flooded by the melting of the snow and the spring rains, that the army had to march four days in water, without finding any other dry spot for resting by night than was supplied by piling the baggage or by the sumpter animals that had fallen.

The troops underwent unutterable sufferings, particularly the Gallic infantry, which marched behind the Carthaginians along tracks already rendered impassable: they murmured loudly and would undoubtedly have dispersed to a man, had not the Carthaginian cavalry under Mago, which brought up the rear, rendered flight impossible.