Celtiberia at English => English (The Britannica Concise) Of Explained:
Mountainous district, ancient Spain. Located in NE Spain between the Ebro and Tagus rivers, it had long been inhabited before it was occupied in the 3d cent. BC by tribes of mixed Iberian and Celtic stock. The Celtiberians first submitted to Rome in the early 2nd cent. BC but were not completely dominated until 133 BC. Excavated horse bits, daggers, and shield fittings attest to their warlike nature.