Dating voor christenen
Not all of Diocletian's plans were successful: the Edict on Maximum Prices (301), his attempt to curb inflation via price controls, was counterproductive and quickly ignored.
The first time Diocletian's whereabouts are accurately established, in 282, he was made by the newly Emperor Carus commander of the Protectores domestici, the élite cavalry force directly attached to the Imperial household – a post that earned him the honor of a consulship in 283.
By March 284, Numerian had only reached Emesa (Homs) in Syria; by November, only Asia Minor.
On 20 November 284, the army of the east gathered on a hill 5 kilometres (3.1 mi) outside Nicomedia.
Diocletian delegated further on 1 March 293, appointing Galerius and Constantius as Caesars, junior co-emperors.
Under this 'tetrarchy', or "rule of four", each emperor would rule over a quarter-division of the empire.