Rubuta ci gaba don wannan sakin layi - Bayan 'yan watanni bayan hauhawar Ivan Shishman zuwa kursiyin, a ranar 26 ga Satumba, 1371, Ottoman Turks sun kayar da babbar rundunar kirista da' yan uwan Serbia Vukašin Mrnjavčević da Jovan Uglješa ke jagoranta a yakin Chernomen
Ka yi haƙuri. Kodayake Uglješa ya yi ƙoƙarin ƙirƙirar babban haɗin gwiwa wanda zai haɗa da Bulgaria, Ivan Shishman, wanda dole ne ya ƙarfafa ikonsa, bai shiga ba. Bayan nasarar da suka yi a Chernomen, Turkawa nan da nan suka juya wa Bulgaria. Sarkin Ottoman Murad I ya tilasta Ivan Shishman ya koma arewacin tsaunukan Balkan kuma ya ci arewacin Thrace, Rhodopes, Kostenets, Ihtiman da Samokov. Ba zai iya tsayayya da hare-haren ba, Ivan Shishman ya yi shawarwari tare da Ottomans a 1373. An tilasta masa ya zama Ottoman vassal kuma ya ba 'yar'uwarsa Kera Tamara, wacce aka san ta da kyanta, ta zama matar Murad I. A karkashin wannan yarjejeniyar, Bulgaria ta sake dawo da wasu yankuna da aka ci nasara kamar Ihtiman da Samokov, kuma ta fara kusan shekaru goma na kwanciyar hankali tare da Turkawa. Duk da kasancewa da yarjejeniyar zaman lafiya, an sake sabunta hare-haren Ottoman a farkon 1380s kuma ya ƙare a 1385 tare da faduwar Sofia, mafaka ta ƙarshe na Ivan Shishman zuwa kudancin tsaunukan Balkan.