He raised his sword to the light of the sun and swore an oath disclaiming responsibility for Numerian's death.
He lived out his retirement in his palace on the Dalmatian coast, tending to his vegetable gardens.
His palace eventually became the core of the modern-day city of Split in Croatia.
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.
– left his sons Numerian and Carinus as the new Augusti.
He defeated the Sarmatians and Carpi during several campaigns between 285 and 299, the Alamanni in 288, and usurpers in Egypt between 297 and 298.