Sarkin Bulgaria ya yanke shawarar cewa abokin hamayyarsa zai bi ta hanyar Tryavna Pass.Sojojin Rumawa sun yi tattaki sannu a hankali zuwa kudu, sojojinsu da jirgin dakon kaya sun yi tafiyar kilomita.'Yan kasar Bulgaria sun isa gabansu inda suka yi kwanton bauna daga kololuwar wani lungu da sako.Jami'an tsaron na Byzantine sun mayar da hankali wajen kai hari a cibiyar da shugabannin Bulgaria ke tsaye, amma da zarar manyan sojojin biyu suka hadu aka yi artabu da hannu da hannu, 'yan Bulgarian da ke kan tudu sun yi wa sojojin Rumawa ruwan duwatsu da kibau.A firgice ne Rumawa suka watse suka fara ja da baya ba tare da wani tsari ba, lamarin da ya sa aka tuhumi Bulgeriya, inda suka kashe duk wanda ke kan hanyarsa.Da kyar Isaac II ya tsere;sai da masu gadinsa suka yanke hanya ta cikin sojojin nasu, wanda hakan ya baiwa kwamandansu damar tserewa daga harin.Masanin tarihin Rumawa Niketas Choniates ya rubuta cewa Isaac Angelos ne kawai ya tsira kuma yawancin sauran sun halaka.Yakin ya kasance babban bala'i ga Rumawa.Sojojin da suka yi nasara sun kama dukiyar daular da suka hada da kwalkwali na zinariya na sarakunan Rumawa, kambi da kuma Imperial Cross wanda aka dauke shi mafi daraja mallakar sarakunan Byzantine - wani katafaren gidan ajiyar zinari mai dauke da wani yanki na Cross Cross.Wani limamin Rumawa ne ya jefa shi a cikin kogin amma ’yan kasar Bulgeriya suka gano shi.Nasarar ta kasance mai mahimmanci ga Bulgaria .Har zuwa wannan lokacin, Sarkin sarakuna shine Peter IV, amma, bayan manyan nasarorin da ƙanensa ya samu, an yi masa shelar Sarkin sarakuna daga baya a waccan shekarar.