Kammala wannan jumla: A matsayin sajan, a watan Yulin 1916 an tura shi zuwa Brigade na 1 na Legions, inda ya yi aiki har zuwa rikicin rantsuwa. An kama shi a ranar 4 ga Satumba 1917 kuma aka daure shi a Przemyśl. An yi masa barazanar hukuncin kisa saboda sa hannu a rikicin. Ba da daɗewa ba bayan haka aka sake shi kuma aka tilasta shi ya shiga rundunar sojojin Austro-Hungary, daga inda ya gudu a watan Maris na 1918. Ya shiga cikin rundunar sojojin Poland ta II a Rasha karkashin jagorancin Janar Józef Haller, wanda a cikin sa ya shiga cikin
Yaƙin Kaniów. Bayan ya tsere daga fursunonin Jamus, sai ya shiga Kungiyar Sojojin Poland a Kiev. Ya shiga cikin ayyukan rushewa da yawa da yaƙe-yaƙe tare da sojojin Jamus, da na Ukraine. Ya kuma shiga cikin sojojin Austriya.