Flavius Valerius SeverusFlavius Valerius Severus
was a soldier from the Illyrian
provinces before his associate Galerius
appointed him Caesar
. On the death of Constantine I
, he was promoted Augustus
. When Maxentius
, the son of the retired emperor Maximian
, revolted at Rome
, Galerius sent him to suppress the rebellion, but the walls of Rome and the desertion of his own men forced him to retreat to Ravenna
, where he surrendered to Maximian.
When Galerius himself invaded Italy in 307 to suppress both Maxentius and his father, Maxentius treacherously had him killed at Tres Tabernae.