The First Celtiberian War (181–179 BC) and Second Celtiberian War (154–151 BC) were two of the three major rebellions by the Celtiberians (a loose alliance of Celtic tribes living in east central Hispania, among which we can name the Pellendones, the Arevaci, the Lusones, the Titti and the Belli) against the presence of the Romans in Hispania.
When the Second Punic War ended, the Carthaginians relinquished the control of its Hispanic territories to Rome. The Celtiberians shared a border with this new Roman province. They started to confront the Roman army acting in the areas around Celtiberia and this led to the First Celtiberian War. The Roman victory in this war and the peace treaties established by the Roman praetor Gracchus with several tribes led to 24 years of relative peace.