Tsakanin shekara ta 755 zuwa 775, Sarkin Rumawa Constantine V ya shirya fafutuka tara don kawar da Bulgaria kuma ko da yake ya yi nasarar kayar da Bulgaria sau da yawa, amma bai taba cimma burinsa ba.A cikin 759, sarki ya jagoranci sojoji zuwa Bulgaria, amma Khan Vinekh yana da isasshen lokaci don hana hawan dutse da yawa.Lokacin da Rumawa suka isa mashigin Rishki, an yi musu kwanton bauna, aka ci su gaba daya.Masanin tarihin Bizantine Theophanes the Confessor ya rubuta cewa Bulgarian sun kashe dabarun Thrace Leo, kwamandan wasan kwaikwayo, da sojoji da yawa.Khan Vinekh bai yi amfani da damar da ya dace don ci gaba a yankin abokan gaba ba kuma ya kai karar zaman lafiya.Wannan aikin ba shi da farin jini sosai a tsakanin manyan mutane kuma an kashe Khan a cikin 761.