Commentary

trecenti: Describes milites.
perierunt: Syncopated or shortened form of periverunt. Possibly to save more space in this shortened edition of history. SyncForm
• Cimbris ... sublata sunt: Translate as "... were removed from the Cimbri." AblSep
duo: Supply signa or "standards." Military standards were carried by Roman legions. To have one's standard be captured by the enemy was a great symbolic — and literal — loss. Alternatively, to recover them from the enemy was a great victory.
XXXI: Signa can be understood with XXXI just as with duo above. Supply reportavit as the verb.
belli finis: The Battle of Vercellae, located here, marked the final end to this war that had lasted more than 10 years..