Diocletian was Roman emperor from 284 to 305 CE. After the defeat and death of the Roman emperor Philip the Arab in 249 CE, the empire endured over three decades of ineffective rulers. The glory days of Augustus, Vespasian, and Trajan were long gone, and the once-powerful Roman Empire suffered both financially and militarily. There were constant attacks along the Danube River as well as in the eastern provinces. Finally, in 284 CE a man rose to the imperial throne who would completely change the face of the empire. His name was Diocletian.

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