Kammala wannan jumlar: An haifi Augustin Dubail a Belfort a ranar 15 ga Afrilu, 1851. Ya kammala karatunsa daga makarantar soja ta Saint-Cyr a 1870 kuma an ba shi izinin zama jami'i a cikin sojan sama. A lokacin yakin Franco-Prussian Dubail ya yi yaƙi a Saarbrücken,
Spicheren, Borny kafin a kama shi a Metz. Bayan yaƙin Dubail ya yi aiki a matsayin farfesa a Saint-Cyr, a matsayin jami'i a kan iyaka da kuma a Aljeriya, inda a 1901 ya zama colonel na 3rd Zouaves.