Ku dhammaystir weedha soo socota: Sida ku xusan taariikhda John Skylitzes, abuurista mawduuca Dryinopolis, iyo sidoo kale Koloneia u dhow, iyo dejinta maxaabiista Byzantine ee ciidanka Bulgaariya ayaa loogu talagalay xoojinta jagooyinka Byzantine ee Epirus ka dhanka ah weerarada cadowga ee mustaqbalka ee Bartamaha iyo Galbeedka Macedonia. Halista Bulgaariya ayaa si ku meel gaar ah u baaba'day kaddib markii
ku darista Boqortooyadii ugu horeysay ee Bulgaariya.