Constantius Chlorus made a praetorian prefect in the West under Maximian.
March 1
Maximian promotes Constantius Chlorus to Caesar with the approval of Diocletian.
May 1
Diocletian announces his resignation. Maximian follows suit. Constantius and Galerius are promoted to Augusti, while Severus II and Maximinus are appointed Caesars.
July
Constantine the Great and Maxentius agree to a peace, brokered by Maximian, where Constantine marries Maximian’s daughter Fausta and Constantine would support Maxentius in Italy.
Maximian returns to Rome but falls out with his son, Maxentius
Maximian attempts to take his son Maxentius‘ title. This fails and he returns to the court of Constantine the Great.
November 11
Galerius calls a council to discuss the disruptive western provinces. Diocletian and Maximian attend. Maximian is forced to abdicate and Constantine the Great is demoted to Caesar under the new Augustus Licinius.
Maximian rebels against Constantine the Great while he is fighting the Franks.
July
Constantine the Great captures Maximian at Arles when the citizens open their rear gates to him. Maximian commits suicide.
July 25
Constantine the Great, no longer able to rely on the Maximian family for name, invents that he descended from Claudius Gothicus.