The new foundations were, in or near the former territory of the Senones, Potentia (near Recanati not far from Ancona: in 570) and Pisaurum (Pesaro: in 570), and, in the newly acquired district of the Boii, the fortresses of Bononia (565), Mutina (571), and Parma (571); the colony of Mutina had been already instituted before the war under Hannibal, but that war had interrupted the completion of the settlement.
The construction of fortresses was associated, as was always the case, with the formation of military roads.

The Flaminian way was prolonged from its northern termination at Ariminum, under the name of the Aemilian way, to Placentia (567).

Moreover, the road from Rome to Arretium or the Cassian way, which perhaps had already been long a municipal road, was taken in charge and constructed anew by the Roman community probably in 583; while in 567 the track from Arretium over the Apennines to Bononia as far as the new Aemilian road had been put in order, and furnished a shorter communication between Rome and the fortresses on the Po.

By these comprehensive measures the Apennines were practically superseded as the boundary between the Celtic and Italian territories, and were replaced by the Po.

South of the Po there henceforth prevailed mainly the urban constitution of the Italians, beyond it mainly the cantonal constitution of the Celts; and, if the district between the Apennines and the Po was still reckoned Celtic land, it was but an empty name.
Liguria In the north-western mountain-land of Italy, whose valleys and hills were occupied chiefly by the much-subdivided Ligurian stock, the Romans pursued a similar course.