Jan 18   General Maxentius drives out Western Roman emperor Constans.   

Jun 03   Roman usurper Nepotianus, of the Constantinian dynasty, proclaims himself Roman Emperor, entering Rome at the head of a group of gladiators.   

Jun 30   Nepotianus, Roman usurper.   

Jun 30   Roman usurper Nepotianus, of the Constantinian dynasty, is defeated and killed by troops of the usurper Magnentius, in Rome   

Jun 30   Nepotianus: Roman usurper