Macrīnus in Harpers Dictionary of Classical Antiquities

A Roman emperor from April, A.D. 217, to June 218. Born of humble parentage at the Mauretanian Caesarea, he became praetorian praefect under Caracalla, whom he accompanied against the Parthians, and whose death he procured, in order that he might become his successor. As emperor he won considerable popularity by the remission of certain oppressive taxes, but suffering at Nisibis a defeat at the hands of the Parthians, and losing the love of his soldiers by his severe discipline, he was attacked by the forces who had proclaimed Elagabalus as emperor and defeated by them. Escaping in disguise, he was taken prisoner in Chalcedon and put to death. His life has come down to us written by Capitolinus.

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