Roman Empire - Diocletian raised his fellow-officer Maximian to a co-emperor

Time: Thursday Jul 30, 285

Place: Mediolanum (Present-Day Milan, Italy)

Details: Conflict boiled in every province, from Gaul to Syria, Egypt to the lower Danube. It was too much for one person to control, and Diocletian needed a lieutenant. At some time in 285 at Mediolanum (Milan), Diocletian raised his fellow-officer Maximian to the office of caesar, making him co-emperor.

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