<prompt> Pedzisa mutsara unotevera: Mwedzi mishomanana chete mushure mekukwira kwaIvan Shishman pachigaro, musi wa 26 Gunyana 1371, maOttoman maTurkey akakunda hondo huru yechiKristu yaitungamirirwa nehama dzeSerbia Vukašin Mrnjavčević naJovan Uglješa mu  <response>: Hondo yeChernomen. Kunyange zvazvo Uglješa akanga aedza kuumba mubatanidzwa wakakura waizobatanidza Bulgaria, Ivan Shishman, uyo aifanira kusimbisa simba rake pachake, haana kubatana. Pashure pokukunda kwavo paChernomen, vaTurkey pakarepo vakatendeukira kuBulgaria. Mutongi weOttoman Murad I akamanikidza Ivan Shishman kuti adzokere kuchamhembe kweMakomo eBalkan uye akakunda kuchamhembe kweThrace, Rhodopes, Kostenets, Ihtiman neSamokov. Asingakwanisi kudzivisa kurwiswa kwacho, Ivan Shishman aifanira kutaurirana nevaOttoman muna 1373. Akamanikidzwa kuva muranda weOttoman uye kubvumira hanzvadzi yake Kera Tamara, uyo aizivikanwa nerunako rwake, kuti ave mudzimai waMurad I. Pasi pechibvumirano ichi, Bulgaria yakadzorera dzimwe nzvimbo dzakakundwa dzakadai seIhtiman neSamokov, uye yakatanga makore anenge gumi erunyararo rusina kugadzikana nevaTurkey. Pasinei nokuva vassalage uye chibvumirano chorugare, kurwisa kweOttoman kwakatangazve mukutanga kwema1380 uye kwakaguma muna 1385 nekudonha kweSofia, nhare yekupedzisira yaIvan Shishman kumaodzanyemba kweMakomo eBalkan. 