11. From the Flavian era onwards, the auxilia were an all-volunteer force. 12. At this time both legions and auxilia were almost all based in frontier provinces. 13. Legionaries frequently transferred to the auxilia ( mostly promoted to a higher rank ). 14. They were rescued by " auxilia palatina " regiments that heard the uproar. 15. The legion-and auxilia camps were mainly located in the immediate vicinity of the riverbank. 16. The Romans had now deployed no less than 15 legions and an equivalent number of auxilia . 17. There are also instances of legionaries transferring to the auxilia ( to a higher rank ). 18. It could also be earned by serving the minimum 25-year term in the auxilia . 19. It could be earned by serving in the auxilia for the minimum 25-year term. 20. Knowledge of the auxilia is therefore dependent on inscriptions found bearing the regiment's name.
