Sentinel is the name of the Axalon's automated defense system which proved to be extraordinarily effective. To put it simply, most battles near the Maximal Base ended by someone activating Sentinel. This caused the Maximal device to be highly coveted by the Predacons. Despite these drawbacks, it was still a lot better than the original shield system found on the Axalon, which had quickly failed while battling the Darksyde in orbit and could be permanently disabled if hit while its circuitry was damaged. Chain of Command