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 By these comprehensive measures the Apennines were practically superseded as the boundary between the Celtic and Italian territories, and were replaced by the Po.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. Those dwelling immediately to the north of the Arno were extirpated. This fate befell chiefly the Apuani, who dwelt on the Apennines between the Arno and the Magra, and incessantly plundered on the one side the territory of Pisae, on the other that of Bononia and Mutina. Those who did not fall victims in that quarter to the sword of the Romans were transported into Lower Italy to the region of Beneventum (574); and by energetic measures the Ligurian nation, from which the Romans were obliged in 578 to recover the colony of Mutina which it had conquered, was completely crushed in the mountains which separate the valley of the Po from that of the Arno. The fortress of Luna (not far from Spezzia), established in 577 in the former territory of the Apuani, protected the frontier against the Ligurians just as Aquileia did against the Transalpines, and gave the Romans at the same time an excellent port which henceforth became the usual station for the passage to Massilia and to Spain. The construction of the coast or Aurelian road from Rome to Luna, and of the cross road carried from Luca by way of Florence to Arretium between the Aurelian and Cassian ways, probably belongs to the same period.
With the more western Ligurian tribes, who held the Genoese Apennines and the Maritime Alps, there were incessant conflicts. They were troublesome neighbours, accustomed to pillage by land and by sea: the Pisans and Massiliots suffered no little injury from their incursions and their piracies. But no permanent results were gained amidst these constant hostilities, or perhaps even aimed at; except apparently that, with a view to have a communication by land with Transalpine Gaul and Spain in addition to the regular route by sea, the Romans endeavoured to clear the great coast road from Luna by way of Massilia to Emporiae, at least as far as the Alps--beyond the Alps it devolved on the Massiliots to keep the coast navigation open for Roman vessels and the road along the shore open for travellers by land. The interior with its impassable valleys and its rocky fastnesses, and with its poor but dexterous and crafty inhabitants, served the Romans mainly as a school of war for the training and hardening of soldiers and officers.
Corsica Sardinia
Wars as they are called, of a similar character with those against the Ligurians, were waged with the Corsicans and to a still greater extent with the inhabitants of the interior of Sardinia, who retaliated for the predatory expeditions directed against them by sudden attacks on the districts along the coast. The expedition of Tiberius Gracchus against the Sardinians in 577 was specially held in remembrance, not so much because it gave "peace" to the province, as because he asserted that he had slain or captured as many as 80,000 of the islanders, and dragged slaves thence in such multitudes to Rome that "cheap as a Sardinian" became a proverb.
Carthage
In Africa the policy of Rome was substantially summed up in the one idea, as short-sighted as it was narrow-minded, that she ought to prevent the revival of the power of Carthage, and ought accordingly to keep the unhappy city constantly oppressed and apprehensive of a declaration of war suspended over it by Rome like the sword of Damocles. The stipulation in the treaty of peace, that the Carthaginians should retain their territory undiminished, but that their neighbour Massinissa should have all those possessions guaranteed to him which he or his predecessor had possessed within the Carthaginian bounds, looks almost as if it had been inserted not to obviate, but to provoke disputes. The same remark applies to the obligation imposed by the Roman treaty of peace on the Carthaginians not to make war upon the allies of Rome; so that, according to the letter of the treaty, they were not even entitled to expel their Numidian neighbours from their own undisputed territory. With such stipulations and amidst the uncertainty of African frontier questions in general, the situation of Carthage in presence of a neighbour equally powerful and unscrupulous and of a liege lord who was at once umpire and party in the cause, could not but be a painful one; but the reality was worse than the worst expectations. As early as 561 Carthage found herself suddenly assailed under frivolous pretexts, and saw the richest portion of her territory, the province of Emporiae on the Lesser Syrtis, partly plundered by the Numidians, partly even seized and retained by them.