# How the Tetrarchy Won the East

An episode of [Emperors of Rome](https://invisiblenetwork.ai/podcast/850148806), 21 Mar 2026, 35 min.

Audio: https://www.mattsmithpodcast.com/emperors/260322-diocletian05.mp3

With the tetrarch system still taking shape, Diocletian and his Caesar Galerius come under growing pressure in the East, facing rebellion from Egypt and invasion from the Persian King Naresh. A series of hard campaigns, careful political choices and eventual victory will determine whether this new imperial order can truly secure Rome's frontiers. Support Emperors of Rome on Patreon: patreon.com/romepodcast This month's bonus episode on Patreon is with Rhiannon Evans, looking at panegyrics.. Episode CCLIII (253) Part V of Diocletian Guest: Professor Caillan Davenport (Centre for Classical Studies, Australian National University)

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