Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
The fate of the Eburones was dreadful.
However they might hide themselves in forests and morasses,
there were more hunters than game. Many put themselves to death
like the gray-haired prince Catuvolcus; only a few saved life
and liberty, but among these few was the man whom the Romans sought
above all to seize, the prince Ambiorix; with but four horsemen
he escaped over the Rhine. This execution against the canton
which had transgressed above all the rest was followed in the other
districts by processes of high treason against individuals.
The season
for clemency was past. At the bidding of the Roman proconsul
the eminent Carnutic knight Acco was beheaded by Roman lictors
(701) and the rule of the -fasces- was thus formally inaugurated.
Opposition was silent; tranquillity everywhere prevailed. Caesar
went as he was wont towards the end of the year (701) over the Alps,
that through the winter he might observe more closely
the daily-increasing complications in the capital.