Eastern Mediterranean 293: First Tetrarchy

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Political map of the Eastern Mediterranean on 01 Mar 293 (NO MAPS FOR THIS PERIOD YET: First Tetrarchy), showing the following events: Diocletian–Bahram II Treaty; First Tetrarchy.

By 293 Diocletian had become convinced that a new system was needed to secure both the Roman Empire and the succession. In March he presided over the appointment of two Caesars (subordinates and heirs)—Galerius to serve with him in the East and Constantius to join Maximian in the West. This rule of four men—two Augusti (emperors) and two Caesars—later became known as the Tetrarchy.

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Main Events

287 Diocletian–Bahram II Treaty ▲

In 287 Diocletian moved against Sasanian Persia, but a major war appears to have been averted when Shah Bahram II agreed to a treaty with the Romans. The terms of the agreement are unknown, but Armenian tradition, supported by Roman panegyrics, holds that Diocletian installed Tiridates III as king in part of Armenia at this time. Tiridates would later embrace Christianity and make Armenia the first officially Christian state (both in 301). in wikipedia

1 Mar 293 First Tetrarchy ▲

In order to further secure both the Roman Empire and the succession, Diocletian presided over the appointment of two Caesars—Constantius to serve with Maximian in the West and Galerius to join Diocletian in the East. Both men, who had already proved themselves as loyal officers, divorced their current wives to marry the daughters of their superiors. For reasons unknown, Constantius was also given the title Jovius (Jupiter) and Galerius the inferior title Herculius (Hercules). This rule of four men—two Augusti and two Caesars—later became known as the Tetrarchy. in wikipedia

290s 293 Armenia Eastern Roman Empire Gaul Illyria Iran maps March March 1 Roman Empire Western Roman Empire

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