The only guards provided against all these contingencies were twenty-two cohorts,
which were collected from the entire province by Lucius Caesar, the
lieutenant, and opposed to the enemy in every quarter. The Helvii,
voluntarily engaging in battle with their neighbors, are defeated, and
Caius Valerius Donotaurus, the son of Caburus, the principal man of the state, and several others, being
slain, they are forced to retire within their towns and fortifications. The
Allobroges, placing guards along the course of the Rhine
, defend their frontiers with great vigilance and energy. Caesar, as he perceived that the enemy were superior in
cavalry, and he himself could receive no aid from the Province or Italy, while all communication was cut off, sends across the Rhine
into Germany to those
states which he had subdued in the preceding campaigns, and summons from them
cavalry and the light-armed infantry, who were accustomed to engage among them.
On their arrival, as they were mounted on unserviceable horses, he takes horses
from the military tribunes and the rest, nay, even from the Roman knights and veterans, and distributes them among the Germans.