Kammala jumla mai zuwa: Gwamnatin Young Turk ta sanya hannu kan wata yarjejeniya ta sirri tare da Jamus kuma ta kafa Ottoman-German Alliance a watan Agusta 1914, wanda aka yi niyya ga abokin gaba na Rasha amma ya daidaita Daular tare da bangaren Jamus. Daular Ottoman ta shiga Yaƙin Duniya na 1 bayan "Goeben" da "Breslau" lamarin, wanda ya ba da mafaka ga jiragen ruwa biyu na Jamus waɗanda ke tserewa daga jiragen ruwa na Burtaniya. Wadannan jiragen ruwa sannan - bayan an canza su a hukumance zuwa rundunar sojan ruwa ta Ottoman, amma har yanzu suna karkashin ikon Jamus - sun kai hari ga tashar jiragen ruwa ta Rasha ta Sevastopol, don haka ya jawo Daular zuwa cikin yakin a bangaren Kasashen Tsakiya, wanda ya shiga cikin wasan kwaikwayo na Gabas ta Tsakiya. Akwai manyan nasarorin Ottoman da yawa a farkon shekarun yaƙin, kamar Yaƙin Gallipoli da
Siege na Kut, amma akwai kuma koma baya, irin su bala'in Caucasus Campaign da Rasha. Amurka ba ta taba yin yaki da Daular Ottoman ba.