sentences:  His father was a Thracian and his mother Romula was a Dacian woman, who left Dacia because of the Carpians' attacks.He originally followed his father's occupation, that of a herdsman, where he was nicknamed "Armentarius", herdsman ().He served with distinction as a soldier under Emperors Aurelian and Probus, and in 293 at the establishment of the Tetrarchy, was designated "Caesar" along with Constantius Chlorus, receiving in marriage Diocletian's daughter Valeria (later known as Galeria Valeria), and at the same time being entrusted with the care of the Illyrian provinces.