On August 8 , 121 BC the legions of Quintus Fabius Maximus defeated them .
On August 8 , 121 BC the legions of Quintus Fabius Maximus forced them to submit ; Maximus earned the cognomen Allobrogicus for this feat .
On August 8 , 121 BC the legions of Quintus Fabius Maximus defeated them and forced them to submit ; Maximus earned the cognomen Allobrogicus for this feat .