Kammala wannan jumla: An haifi Stahel a Szeged, Masarautar Hungary, kilomita 200 kudu maso gabashin Budapest. Bayan ya yi karatu a Szeged da Budapest, ya shiga rundunar sojojin Austriya, inda ya kai matsayin laftanar. Stahel ya shiga motsi don 'yancin kai na Hungary wanda Lajos Kossuth ya jagoranta a lokacin yakin basasa.
Juyin juya halin 1848. Ya yi aiki a kan ma'aikatan Janar Artúr Görgey da Janar Richard Debaufre Guyon. Sa'ad da aka dakatar da tawayen Hungary da aka yi wa daular Habsburg a shekara ta 1849, ya gudu zuwa Prussia kuma daga baya zuwa Ingila kafin ya ƙaura zuwa Amirka a shekara ta 1859. Har zuwa barkewar Yaƙin Basasa na Amurka, ya yi aiki da "Deutsche illustrirte Familienblätter", jaridar yaren Jamusanci a Birnin New York.