Yakin Balkan yana nufin jerin tashe-tashen hankula guda biyu da suka faru a cikin ƙasashen Balkan a cikin 1912 da 1913. A cikin yaƙin Balkan na farko, ƙasashen Balkan huɗu na Girka , Serbia, Montenegro da Bulgaria sun shelanta yaƙi da Daular Usmaniyya kuma suka ci ta. a cikin wannan tsari na kwace daular Ottoman daga lardunan Turai, inda ta bar Gabashin Thrace a karkashin Daular Usmaniyya.A cikin Yaƙin Balkan na biyu, Bulgaria ta yi yaƙi da dukkan mayaƙan asali huɗu na farkon yaƙin.Haka kuma ta fuskanci hari daga kasar Romania daga arewa.Daular Ottoman ta rasa mafi yawan yankunanta a Turai.Ko da yake ba a shiga a matsayin mai gwagwarmaya ba, Ostiriya-Hungary ya zama mai rauni kamar yadda Serbia mai girma ta matsawa ga haɗin gwiwar mutanen Slavic ta Kudu.Yaƙin ya kafa mataki don rikicin Balkan na 1914 kuma ta haka ya zama "shafi ga yakin duniya na farko ".A farkon karni na 20, Bulgaria, Girka, Montenegro da Serbia sun sami 'yancin kai daga Daular Usmaniyya, amma manyan al'ummomin kabilunsu sun kasance karkashin mulkin Ottoman.A shekara ta 1912, waɗannan ƙasashe sun kafa ƙungiyar Balkan.Yakin Balkan na farko ya fara ne a ranar 8 ga Oktoban 1912, lokacin da kasashe mambobin kungiyar suka kai wa Daular Usmania hari, kuma ya kare bayan watanni takwas tare da rattaba hannu kan yarjejeniyar London a ranar 30 ga Mayu 1913. Yakin Balkan na biyu ya fara ne a ranar 16 ga Yuni 1913, lokacin da Bulgaria. , ba ta gamsu da asarar da ta yi a ƙasar Makidoniya ba, ta kai hari kan tsoffin abokan kawancenta na Balkan League.Hadin gwiwar sojojin Sabiya da na Girka, tare da manyan adadinsu sun dakile harin da Bulgaria ta yi da kuma kai wa Bulgaria hari ta hanyar mamaye ta daga yamma da kudu.Romania, kasancewar ba ta shiga cikin rikicin ba, tana da rundunonin dakaru da za su kai farmaki tare da mamaye Bulgaria daga arewacin kasar wanda ya saba wa yarjejeniyar zaman lafiya tsakanin jihohin biyu.Daular Ottoman kuma ta kai hari ga Bulgaria kuma ta ci gaba a Thrace tana maido da Adrianople.A sakamakon yerjejeniyar Bucharest, Bulgaria ta yi nasarar maido da mafi yawan yankunan da ta samu a yakin Balkan na farko.Duk da haka, an tilastawa mika tsohon Ottoman kudancin lardin Dobruja zuwa Romania.Yaƙe-yaƙe na Balkan sun kasance alama ce ta kawar da ƙabilanci tare da kowane ɓangaren da ke da alhakin kisan gillar da aka yi wa farar hula tare da taimakawa wajen tayar da zalunci daga baya ciki har da laifukan yaki a lokacin yakin Yugoslavia na 1990.