Rubuta ci gaba ga wannan sakin layi - An kafa Catepanate na Ras tsakanin 971 <unk> 976, a lokacin mulkin John Tzimiskes (r. 969 zuwa 976). An sanya hatimi na "strategos" na Ras zuwa zamanin Tzimiskes, yana mai yiwuwa ga magajin Tzimiskes Nikephoros II Phokas ya sami karbuwa a Rascia. "Protospatharios da katepano na Ras" wani gwamnan Byzantine ne mai suna John. Bayanai game da "katepano" na Ras a lokacin mulkin Tzimiskes sun ɓace. Kasancewar sojojin Byzantine ya ƙare ba da daɗewa ba bayan haka tare da yaƙe - yaƙe da Bulgaria
, kuma an sake kafa shi ne kawai c. 1018 tare da ɗan gajeren lokaci na Sirmium, wanda, duk da haka, bai faɗaɗa sosai cikin Rascia daidai ba. Bosnia ta fito a matsayin jihar bayan mutuwar Časlav.