When Diocletian decided that the Empire was too large to be ruled by one individual, the Empire had been effectively ruled by one emperor for almost two centuries.What factors explain Diocletian's decision to share rule? What had changed internally and externally between the time of the "five good emperors" and the time of Diocletian?

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The Answer of When Diocletian decided that the Empire was too large to be ruled by one individual, the Empire had been effectively ruled by one emperor for almost two centuries.What factors explain Diocletian's decision to share rule? What had changed internally and externally between the time of the "five good emperors" and the time of Diocletian?

When Diocletian Decided That the Empire Was Too Large to Be