 Ramba uchiverenga ndima iyi - VaBulgaria veAsparuh vakatamira kumadokero kunzvimbo yava kunzi Bessarabia, vakakunda nharaunda dziri kuchamhembe kweDanube muWallachia yemazuva ano, uye vakazvisimbisa muDanube Delta. Muna 670s vakayambuka Danube vachipinda muScythia Minor, yainzi dunhu reByzantium, ine masango ane uswa uye mafuro aive akakosha kumombe huru dzevaBulgaria kuwedzera kunzvimbo dzekufudza kumadokero kwerwizi rweDniester dzaive dzatova pasi pavo. Muna 680 mambo weByzantine Constantine IV r.668685, achangobva kukunda maArabu, akatungamira nhimbe achitungamirira uto hombe uye ngarava kuti adzinge vaBulgaria asi akakundwa zvine njodzi naAsparuh pa Onglos, nharaunda ine matope mukati kana kuti pedyo neDanube Delta uko vaBulgaria vakanga vagadzira musasa wakasimbiswa. VaBulgaria vakaenda kumaodzanyemba, vakayambuka Makomo eBalkan ndokupinda muThrace. Muna 681, vaByzantine vakamanikidzwa kusaina chibvumirano chorugare chinonyadzisa, chichivamanikidza kuziva Bulgaria senyika yakazvimirira, kubvisa nharaunda dziri kuchamhembe kweMakomo eBalkan uye kubhadhara mutero wegore negore. Munyori weWestern Europe Sigebert weGembloux akataura mubhuku rake rinonzi Universal chronicle kuti nyika yeBulgaria yakatangwa muna 680. Iyi ndiyo yakanga iri nyika yokutanga iyo umambo hwakanga hwaziva muBalkan uye nguva yokutanga iyo yakapa zviri pamutemo zvikumbiro zvechikamu chezvinhu zvayo zveBalkan. Munyori wezvakaitika kare weByzantium Theophanes the Confessor akanyora nezvechibvumirano chacho kuti: 