from 284 to 305.
Born to a family of low status in the Roman province of Dalmatia
, Diocletian rose through the ranks of the military to become cavalry commander to the Emperor Carus
. After the deaths of Carus and his son Numerian
on campaign in Persia, Diocletian was proclaimed Emperor. The title was also claimed by Carus' other surviving son, Carinus
, but Diocletian defeated him in the Battle of the Margus
. With his accession to power, Diocletian ended the Crisis of the Third Century
284 Diocletian is proclaimed emperor by his soldiers.
284 Diocletian is chosen as Roman Emperor.
285 Diocletian appoints Maximian as Caesar and co-ruler.
285 Diocletian appoints Maximian as Caesar, co-ruler.
286 Roman Emperor Diocletian raises Maximian to the rank of ''Caesar''.
303 Diocletian, Roman Emperor, publishes his edict that begins the persecution of Christians in his portion of the Empire.
305 Diocletian and Maximian retire from the office of Roman Emperor.
308 At Carnuntum, Emperor ''emeritus'' Diocletian confers with Galerius, ''Augustus'' of the East, and Maximianus, the recently returned former ''Augustus'' of the West, in an attempt to restore order to the Roman Empire.