Sex... consulibus:
This dates the event to 91 BCE.
AblAbs
Sexcentesimo ... ab urbe condita:
To supplement the dating from the consuls, Eutropius also provides a date
ab urbe condita (AUC), "from the founding of the city." In order to calculate this date,
take 753 BCE (the traditional date of the founding of Rome) - # AUC + 1 = ?BCE. Here, it is 659 AUC or 95 BCE.
Eutropius, however, is often a little off on his dates since he is writing some 400 years after the fact. The date
actually was 91 BCE.
AblAbs
Picentes, Marsi, Pelignique:
These are different Italic tribes, which rose against Rome. Other tribes, who joined the rebellion, included the Marsi, Picentines, Paeligni, Marrucini, Vestini, Frentani, Samnites, and Hirpini.
For a map of where the tribes came from, see here.
bellum ... moverunt:
Another idiom involving bellum, translate as "they began a war."
cum... obedirent... tum ... adserere coeperunt:
Translate cum ... tum as "not only... but also."
Annis numerosis as an ablative shows time within which.
AblTime
populo Romano obedirent:Obedirent takes a dative as its object. DatComp
libertatem ... aequam adserere coeperunt:
These tribes - the Picentes, Marsi, and Peligni - were socii or allies of
the Roman Republic. As such, they were entitled to certain privileges, but they still were not granted
full Roman citizenship.