In A.D. 395, when Theodosius died, Honorius and his brother Arcadius jointly
succeeded him to the throne, with Arcadius ruling the east and Honorius the West.
Both boys spent their reigns under the influence of powerful advisers
(Stilicho in the West, Rufinus and Eutropius in the East).
This year 395 marked the beginning of the true de facto division of the
empire into Eastern and Western halves, each under the rule of its own emperor
even though, in theory, the empire remained as a single entity.