Masarautar Dossa masarauta ce kafin zuwan turawa na mulkin mallaka wadda a yanzu take a yankin ƙasar Nijar yanzu wacce ta wanzu har zuwa wannan lokaci. An yi imanin cewa mutanen Djerma ko Zabarmawa na Nijar sun yi ƙaura daga yankin Fulani dake kusa da Lac Debo, Mali a lokacin daular Songhai, kuma suka fara zama a Zarmaganda a ƙarni na 16. A cikin karni na 18, Djerma da yawa sun sake zama a kudu zuwa kwarin Kogin Neja, Fakara da Zigui a cikin yankin da ake kira Kudu maso Yamma a yanzu kusa da Niamey . Irƙirar wasu ƙananan al'ummomi, kowannensu ƙarƙashin jagorancin Djermakoy, waɗannan zaɓuɓɓuka ba da daɗewa ba suka sami matsin lamba daga arewa ta Abzinawa da Fula daga kudu maso gabas, da ma sauran ƙabilun yankin. Yayin da Djermakoy Aboubacar ya kafa jihar Dosso daga danginsa na Taguru a kusa da 1750, ta kasance ƙaramar tarin ƙauyuka a cikin kwarin Dallol Bosso har zuwa 1820s, lokacin da ta jagoranci yawancin juriya ga Halifancin Sokoto . Yayin da Dosso ya fada karkashin ikon Amir na Gando (wani yanki na Sakkwato) tsakanin 1849 da 1856, sai suka ci gaba da rike Djermakoy dinsu da kuma gabatar da mulki na wani babban yankin Djerma, kuma suka musulunta .