Augustus Severus surrenders to Maxentius at Ravenna and is forced to commit suicide.
31 March: Constantine marries Fausta, the daughter of Maximian and sister of Maxentius, at Trier. Minervina, Constantine's mistress and mother of his first son Crispus, is put aside.
Maximian falls out with his son Maxentius and sides with Constantine.
27 October: Maxentius claims the rank of Augustus.