Diocletian and the Tetrarchy (1 janv. 284 – 1 janv. 305)

Description:

Born to a family of low status in Dalmatia. After the deaths of Carus and his son Numerian on campaign in Persia, Diocletian was proclaimed emperor. The title was also claimed by Carus' surviving son, Carinus, but Diocletian defeated him in the Battle of the Margus.

He appointed fellow officer Maximian as Augustus, co-emperor, in 286. Diocletian reigned in the Eastern Empire, and Maximian reigned in the Western Empire. Diocletian delegated further on 1 March 293, appointing Galerius and Constantius as Caesars, junior co-emperors, under himself and Maximian respectively. This introduced 'Tetrarchy'.