Dee ihe na-aga n'ihu maka paragraf a - Oge mbụ enwere ike nke mwakpo Byzantine mechara nke ala ndị Serbia na okike nke mpaghara bụ ihe dị ka 971, mgbe ndị agha Byzantine meriri Bulgaria
wee weghachite ọchịchị Byzantine kachasị elu n'ime ime Ebe Ndịda Ọwụwa Anyanwụ Europe, gụnyere ala ndị Serbia dị n'etiti, dị ka "Chronicle of the Priest of Duklja" gosipụtara. Otu n'ime ógbè ndị ahụ e guzobere ọhụrụ bụ Catepanate nke Ras. E guzobere ya dị ka ebe ndị Byzantine siri ike n'ala ndị Serbia, mana enweghị ike ikpebi ókèala ya. Catepanate adịteghị aka, dịkwa ka ọchịchị Byzantine n'akụkụ ndị ọzọ nke ala Bulgaria na Serbia. Mgbe onwu nke eze ukwu John (976), nnupụisi gara nke ọma bidoro na mpaghara South Slavic nke Alaeze Ukwu Byzantine, nke Cometopuli duziri, na-ebute ọdịda nke ike Byzantine na mpaghara ahụ na mweghachi nke Alaeze Ukwu Bulgaria.