The Numantine War was the last conflict of the Celtiberian Wars fought by the Romans to subdue those people along the Ebro. It was a twenty-year conflict between the Celtiberian tribes of Hispania Citerior and the Roman government. It began in 154 BC as a revolt of the Celtiberians of Numantia on the Douro. The first phase of the war ended in 151, but in 143, war flared up again with a new insurrection in Numantia.

Appian of Alexandria was a Greek historian with Roman citizenship who prospered during the reigns of Emperors of Rome Trajan, Hadrian, and Antoninus Pius.