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Diocletian may be considered the real founder of the late empire, though the form of government he established—the tetrarchy, or four persons sharing power simultaneously—was transitory. His reforms, however, lasted longer. Military exigencies, not the desire to apply a preconceived system, explain the successive nomination of Maximian as Caesar and later as Augustus in 286 and of Constantius and Galerius as Caesars in 293. The tetrarchy was a collegium of emperors comprising two groups: at its head, two Augusti, older men who made the decisions; and, in a secondary position, two Caesars, younger, with a more executive role. All four ...(100 of 71313 words)