Yayin da sojojin Bulgaria da suka ci nasara ke tafiya kudu, kwamandan Rumawa Leo Phokas, wanda ya tsira a Achelous, ya isa Constantinople ta teku kuma ya tara sojojin Rumawa na karshe don su katse abokin gabansa kafin ya isa babban birnin kasar.Dakarun biyu sun yi arangama a kusa da kauyen Katasyrtai da ke wajen birnin kuma bayan fafatawa da dare, an fatattaki Rumawa gaba daya daga fagen daga.Sojojin Byzantine na ƙarshe sun lalace a zahiri kuma an buɗe hanyar zuwa Konstantinoful, amma Sabiyawan sun yi tawaye zuwa yamma kuma Bulgarian sun yanke shawarar tabbatar da bayansu kafin harin ƙarshe na babban birnin Byzantine wanda ya ba abokan gaba lokaci mai daraja don murmurewa.