Page "Diocletian" Paragraph 12

Diocletian may have become involved in battles against the Quadi and Marcomanni immediately after the Battle of the Margus.

He eventually made his way to northern Italy and made an imperial government, but it is not known whether he visited the city of Rome at this time.

There is a contemporary issue of coins suggestive of an imperial adventus ( arrival ) for the city, but some modern historians state that Diocletian avoided the city, and that he did so on principle, as the city and its Senate were no longer politically relevant to the affairs of the Empire and needed to be taught as much.

Diocletian dated his reign from his elevation by the army, not the date of his ratification by the Senate, following the practice established by Carus, who had declared the Senate's ratification a useless formality.

If Diocletian ever did enter Rome shortly after his accession, he did not stay long ; he is attested back in the Balkans by 2 November 285, on campaign against the Sarmatians.