The Silures were not subdued, however, and waged effective guerrilla warfare against the Roman forces. Ostorius had announced that they posed such a danger that they should be either exterminated or transplanted. His threats only increased the Silures' determination to resist. They surrounded and attacked a large legionary force occupied in building Roman forts in their territory; it was rescued by others only with difficulty and considerable loss. The Silures also took Roman prisoners as hostages and distributed them amongst their neighbouring tribes in order to bind them together and encourage resistance.
The Silures were not subdued, however, and waged effective guerrilla warfare against the Roman forces. Ostorius had announced that they posed such a danger that they should be either exterminated or transplanted. His threats only increased the Silures' determination to resist. They surrounded and attacked a large legionary force occupied in building Roman forts in their territory; it was rescued by others only with difficulty and considerable loss The Silures also took Roman prisoners as hostages and distributed them amongst their neighbouring tribes in order to bind them together and encourage resistance.