rights under Roman law in exchange for agreed upon levels of military service, i.e., the Roman magistrates had the right to levy soldier from such states into the Roman legions. However, foederati states that had at one time been conquered by Rome were exempt from payment of tribute to Rome due to their treaty status.

Growing dissatisfaction with the rights afforded to the socii and with the growing manpower demands of the legions (due to the protracted Jugurthine War