II. Severus was born in 260. II. Severus's full name is Flavius Valerius Severus. Severus was the emperor of the Roman state in 305.
Severus was declared a western Roman emperor. But Constantine did not accept Severus's empire. Constantine proclaimed his own Western Roman Emperor. Severus, then, started a war against Constantine. Severus encompassed the city of Rome. But at that time Severus's soldiers betrayed Severus. Severus was killed in 306 by his own soldiers.