 In a series of rapid and successful campaigns starting in 262 , he crossed the Euphrates and recovered Carrhae and Nisibis . He then took the offensive to the <unk> of Persia , and arrived at the walls of its capital Ctesiphon . The city withstood the short siege but Odaenathus reclaimed the entirety of Roman lands occupied by the Persians since the beginning of their invasions in 252 . Odaenathus celebrated his victories and declared himself King of Kings , crowning his son Hairan I as co @-@ king . By 263 , Odaenathus was in effective control of the Levant , Mesopotamia and Anatolia 's eastern region . 
