 However, when these troops gathered, they rebelled under the leadership of a Daesitiate tribal chieftain named Bato and defeated a Roman force sent against them.Although this war is sometimes described as having been fought by the Daesitiatae and the Breuci only, Cassius Dio identified the forces led by Bato the Daesitiate as Dalmatian, indicating a broader composition.According to Velleius Paterculus, the population of the tribes which rebelled was more than 800,000, and they fielded 200,000 infantry and 9,000 cavalry.