Outraged at what had happened, the king of the Caeninenses entered upon Roman territory with his army. Romulus and the Romans met the Caeninenses in battle, killed their king, and routed their army. Romulus later attacked Caenina and took it upon the first assault. Returning to Rome, he dedicated a temple to Jupiter Feretrius (according to Livy, the first temple dedicated in Rome) and offered the spoils of the enemy king as "spolia opima". According to the "Fasti Triumphales", Romulus celebrated a triumph over the Caeninenses on 1 March 752 BC.