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
That partial defection itself was certainly
not high treason, but merely the result of shortsightedness and
exhaustion; beyond doubt these same towns would have rejected with
horror an alliance with the Phoenicians. But still there was a
variance between Romans and Latins, which did not fail injuriously
to react on the subject population of these districts.
A dangerous
ferment immediately showed itself in Arretium; a conspiracy organized
in the interest of Hannibal among the Etruscans was discovered, and
appeared so perilous that Roman troops were ordered to march thither.
The military and police suppressed this movement without difficulty;
but it was a significant token of what might happen in those
districts, if once the Latin strongholds ceased to inspire terror.