154 BC, the expansion of the Roman Empire into Hispania continues. The city of Segada begins reinforcing its defensive walls, an act that Rome sees as a violation of a treaty established twenty years prior. Despite claims by Segada that no violation occurred, Rome prepares for war and deploys a massive Roman force to Segada. In response, the people of Segada, their walls not complete, sought refuge with the Arevaci. Shortly afterwards, they successfully ambush the main Roman force, inflicting thousands of casualties on both sides. The Arevaci are victorious, leaving the Romans humiliated and giving pause to their advance. They assemble at the town of Numantia, known for its strong natural defenses, and prepare for the inevitable Roman retaliation.