1st March » Vetranio is asked by Constantina, sister of Constantius II, to proclaim himself Caesar.
3rd June » The Roman usurper Nepotianus, of the Constantinian dynasty, proclaims himself Roman Emperor, entering Rome at the head of a group of gladiators.
30th June » Roman usurper Nepotianus, of the Constantinian dynasty, is defeated and killed in Rome by troops of the usurper Magnentius.
25th December » Vetranio meets Constantius II at Niš named Naissus (Serbia) and is forced to abdicate his title (Caesar). Constantius allows him to live as a private citizen on a state pension.