<P> Diocletian ( / ˌdaɪ. əˈkliːʃən / ; Latin : Gaius Aurelius Valerius Diocletianus Augustus ) , born Diocles ( 244 -- 312 ) , was a Roman emperor from 284 to 305 . Born to a family of low status in Dalmatia ( Roman province ) , Diocletian rose through the ranks of the military to become roman 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 . Diocletian 's reign stabilized the empire and marks the end of the Crisis of the Third Century . He appointed fellow officer Maximian as Augustus , co-emperor , in 286 . </P>
<P> Diocletian ( / ˌdaɪ. əˈkliːʃən / ; Latin : Gaius Aurelius Valerius Diocletianus Augustus ) , born Diocles ( 244 -- 312 ) , was a Roman emperor from 284 to 305 . Born to a family of low status in Dalmatia ( Roman province ) , Diocletian rose through the ranks of the military to become roman 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 . Diocletian 's reign stabilized the empire and marks the end of the Crisis of the Third Century . He appointed fellow officer Maximian as Augustus , co-emperor , in 286 . </P>
the roman general who began a new system of military
the roman general who began a new system of military
Diocletian
Diocletian