 Nyorera kupfuurira kweiyi ndima - Pakutanga, kupinda kweOttoman kwaisaonekwa sekutyisidzira kwakakosha nevaBulgaria nevaByzantine. Kwemakore gumi chete pakati pa1354 na1364 vaOttoman vakakunda Thrace yose vachitora maguta makuru akadai sePlovdiv, Beroia, Dianopolis Yambol neAdrianople uye vakakunda mauto maduku akawanda eBulgaria. Kusavimbana kwemazana emakore pakati pevaBulgaria nevaByzantium kwakakanganisa nhaurirano pakati pemadzimambo maviri nokuda kwesungano uye kunyange kutungamirira kuhondo yokupedzisira yeByzantium neBulgaria muna 1364. Muna 1371 hondo huru yeBulgaria-Serb pasi paVukašin Mrnjavčević naJovan Uglješa, madzishe maviri eumambo muMacedonia, yakaparadzwa neOttomans pasi paLala Shahin Pasha kuChernomen uye munguva pfupi Emperor weBulgaria aifanira kubvuma kukundwa uye akava vassal kune vapambi. Nhare dzakawanda dzeBulgaria mumakomo eRhodope, mupata weSofia uye kumabvazuva kweBulgaria dzakatorwa imwe neimwe mumakore makumi maviri akatevera. Muna 1393 guta guru reTarnovo rakakombwa ndokutorwaneOttoman Turks uye makore matatu gare gare Vidin - guta guru rokupedzisira reBulgaria - rakawa. Kurwisa vapambi kwakaramba kuchienderera mberi kusvikira muna 1422 apo nyika yacho yakakundwa zvizere. Kupinda kwevaOttoman kwakava njodzi kuhondo yeBulgaria vakuru vakuru uye vatungamiriri vorudzi vakaurayiwa kana kuti vakabva munyika uye vanhuwo zvavo havana kubvumirwa kuva nezvombo kusvikira muzana remakore rechi19. 