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tribes in northeastern Spain of mixed Iberian and Celtic stock; Celts settled in the Iberian Peninsula between the fifth and third centuries B.C. The Arevaci were the main tribe. The area inhabited by the tribes was called Celtiberia. In 195 B.C. part of Celtiberia was conquered by the Romans, and by 72 B.C. the entire region had become part of the Roman province of Hispania Citerior. The subjugated Celtiberians waged a protracted struggle against the Roman conquerors, staging uprisings in 195–193, 181–179, 153–151, 143–133, and 80–72 (the Sertorius rebellion).