The empire physically broke apart into three pieces: the Gallic Empire in the west, the Palmyrene Empire in the east, and the Roman core. Diocletian and the Tetrarchy (284–305 AD)
Diocletian stabilized the economy through price edicts and reorganized the military into mobile field armies. However, he is also remembered for the "Great Persecution," a final, violent attempt to suppress the rising tide of Christianity and restore traditional Roman values. The Roman Empire from Severus to Constantine
Constantine legalized Christianity, moving it from a persecuted cult to the favored religion of the state. The empire physically broke apart into three pieces: