Pedzisa mutsara unotevera: Catepanate yeRas yakavambwa pakati pa971<unk>976, panguva yekutonga kwaJohn Tzimiskes (r. 969 <unk> 976). Chisimbiso che"strategos" yaRas chakanyorwa kuti ndechepanguva yaitonga Tzimiskes, zvichiita kuti zvibvire kuti Nikephoros II Phokas, uyo akatangira Tzimiskes, aizivikanwa muRascia. "Protospatharios naKatepano weRas" aiva gavhuna weByzantium ainzi John. Mashoko pamusoro pe"katepano" yeRas munguva yokutonga kwaTzimiskes haapo. Kuvapo kweuto reByzantium kwakaguma nokukurumidza pashure pacho ne
hondo neBulgaria, uye yakadzorerwa chete ca. 1018 neThema yeSirmium, iyo, zvisinei, haina kuwedzera zvakanyanya muSerbia chaiyo.