Galerius begins a series of two campaigns in Upper Egypt against the rebel cities ofCoptos and Boresis as well as theBlemmyes andMeroitic Nubians.
Over the course of his reign, but especially from the time of the Tetrarchy's creation, Diocletian divides the large provinces of the early empire into smaller administrative units, and he groups these new smaller provinces intodioceses. He also accelerates the third-century trend whereby the administration and military of the provinces are increasingly divided between governors and generals (duces) respectively, whereas formerly governors had also been in charge of the legions. This expansion of imperial personnel increases Diocletian's control over the empire and weakens the power of individual officials and officers. Moreover, Diocletian expands the retinues of the individual emperors to have more ministers and secretaries, thus establishing what will become known as the late RomanConsistorium.
KingBahram II of thePersian Empire dies after a 17-year reign; his sonBahram III ascends to the throne. After four months, Bahram III's great-uncleNarseh, the king ofPersarmenia, marches on the Persian capitalCtesiphon with the support of a faction of the nobility and the eastern Satraps. Bahram is overthrown and Narseh is declared the new King of Kings.
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