warn them, they detained the envoys in captivity
and began the war against Rome with a new attack on Thurii (about
469), while at the same time they invited not only the Samnites and
Tarentines, but the northern Italians also--the Etruscans, Umbrians,
and Gauls--to join them in the struggle for freedom. The Etruscan
league actually revolted, and hired numerous bands of Gauls; the Roman
army, which the praetor Lucius Caecilius was leading to the help of
the Arretines who had remained faithful, was annihilated under the
walls of Arretium by the Senonian mercenaries of the Etruscans: the
general himself fell with 13,000 of his men (470). The Senones were
reckoned allies of Rome; the Romans accordingly sent envoys to them to
complain of their furnishing warriors to serve against Rome, and to
require the surrender of their captives without ransom. But by the
command of their chieftain Britomaris, who had to take vengeance on
the Romans for the death of his father, the Senones slew the Roman
envoys and openly took the Etruscan side. All the north of Italy,
Etruscans, Umbrians, Gauls, were thus in arms against Rome; great
results might be achieved, if its southern provinces also should
seize the moment and declare, so far as they had not already done so,
against Rome. In fact the Samnites, ever ready to make a stand on
behalf of liberty, appear to have declared war against the Romans; but
weakened and hemmed in on all sides as they were, they could be of
little service to the league; and Tarentum manifested its wonted
delay. While her antagonists were negotiating alliances, settling
treaties as to subsidies, and collecting mercenaries, Rome was acting.
The Senones were first made to feel how dangerous it was to gain a
victory over the Romans. The consul Publius Cornelius Dolabella
advanced with a strong army into their territory; all that were not
put to the sword were driven forth from the land, and this tribe was
erased from the list of the Italian nations (471). In the case of a
people subsisting chiefly on its flocks and herds such an expulsion
en masse was quite practicable; and the Senones thus expelled from
Italy probably helped to make up the Gallic hosts which soon after
inundated the countries of the Danube, Macedonia, Greece, and Asia
Minor.

The Boii

The next neighbours and kinsmen of the Senones, the Boii, terrified
and exasperated by a catastrophe which had been accomplished with so
fearful a rapidit