 In Dio's account the two Batos occupied Mount Alma (Mount Fruška Gora, Serbia, just north of Sirmium); here they were defeated by the Thracian cavalry of Rhoemetalces (the king of the Odrysian Kingdom in Thrace, an ally of the Romans) which had been sent ahead against them by Caecina Severus, the governor of Moesia.They then fought hard against Severus, who later went back to Moesia because the Dacians and Sarmatians had crossed the Danube and were ravaging it.Tiberius and Valerius Messallinus lingered in Siscia (Sisak, in present-day central Croatia, the headquarters of the Roman army).