Ka kammala wannan magana: A ƙarni na farko bayan mutuwar Osman I, mulkin Ottoman ya soma faɗaɗa kan Anatolia da kuma Balkans. Yaƙe-yaƙe na farko sun fara ne a lokacin yaƙe-yaƙe na Byzantine-Ottoman, wanda aka yi a Anatolia a ƙarshen karni na 13 kafin shiga Turai a tsakiyar karni na 14, wanda ya biyo baya da
Yaƙe-yaƙe na Bulgarian-Ottoman da Serbian-Ottoman yaƙe-yaƙe sun fara ne a tsakiyar karni na 14. Yawancin wannan lokacin an nuna shi ne ta hanyar Ottoman fadada cikin Balkans. Orhan, ɗan Osman, ya kama birnin Bursa na arewa maso yammacin Anatoliya a 1326, ya mai da shi sabon babban birnin jihar Ottoman kuma ya maye gurbin ikon Byzantine a yankin. An kama muhimmin birni mai tashar jiragen ruwa na Thessaloniki daga Venetians a shekara ta 1387 kuma aka kore shi. Nasarar Ottoman a Kosovo a cikin 1389 ya nuna ƙarshen ikon Serbia a yankin, yana share fagen faɗaɗa Ottoman zuwa Turai. Yaƙin Nicopolis don Tsardom na Bulgarian na Vidin a cikin 1396, wanda aka ɗauka a matsayin babban yaƙin karshe na tsakiyar zamanai, ya kasa dakatar da ci gaban Turkiyya na Ottoman masu nasara.