Mezue ahịrịokwu na-esonụ: N'afọ 1040, Peter Delyan nupụrụ isi megide ọchịchị Byzantine na Theme nke Bulgaria. Ihe
Ọgba aghara malitere na Belgrade ebe a kpọpụtara Delyan ịbụ Eze Ukwu. Ọ gara n'ebe ndịda, na-agafe Rascia na Dendra, wee were ebe ndị Byzantine siri ike nke Naissus na Skopie.