The war against the Samnites could be energetically prosecuted again. By the construction of the Via Appia the Romans secured a military highway from Rome to Capua which greatly facilitated the conduct of operations in Campania. It is probable, too, that the reorganization of the Roman army, which dates from this period, was beginning to bear fruit. From both Campania and Apulia the Romans took the offensive, and several severe defeats forced the Samnites to seek peace in 304. They retained their independence, but the disputed territory on their borders fell to Rome. It was about the close of this war that the Aequi, Marsi, Marrucini, Frentani, Paeligni, some of the Umbrians, and other of the peoples of Central Italy became federate allies of Rome. Apulia likewise passed under Roman control. New Latin colonies and new tribal districts marked the expansion of Roman territory. *Wars with the Samnites, Gauls and Etruscans, 298–80 B. C.* In 298 war broke out again between the Romans and Samnites, apparently because the Lucanians had deserted the Roman alliance for the Samnites. Soon the Samnites allied themselves with the Etruscans and Gauls, and succeeded in uniting the forces of the three peoples in Umbria. But this host was annihilated by the Romans in the battle of Sentinum (295). With this victory all danger for Rome was over. By systematically ravaging the enemy’s country the Roman consuls in 290 B. C. forced the Samnites to sue for peace. They entered the Roman alliance, and a portion of their land was incorporated in the _ager publicus_ of Rome. A similar fate overtook the Sabines and Picentes, who had taken sides with the Samnites. The war with the Etruscans and the Gauls still dragged on. But in 285, after suffering a severe blow at the hands of the Gallic Senones, the Romans took vigorous action and drove this people from the land between Ancona and the Rubicon—the _ager Gallicus_. In the same year the tribe of the Boii, with Etruscan allies, penetrated as far as the Vadimonian Lake, where the Romans inflicted upon them a crushing defeat. Another Roman victory in the next year brought the Boii to terms, and soon the Etruscan cities one by one submitted to Rome, until by 280 all were Roman allies. V. THE ROMAN CONQUEST OF SOUTH ITALY: 281–270 B. C.