 Rambai muchinyora ndima ino - Haana kushandirwa kwemakore akati, asi muna 1804, apo bato rehondo muimba youmambo yeAustria raida mukuru mukuru kuti arwisane nomutemo worugare weArchduke Charles, Mack akaitwa mukuru mukuru wehondo, nemirairo yokugadzirira hondo neFrance. Akaita zvose zvaaigona mukati menguva yaiwanika kuti agadzirise uto, uye pakatanga hondo ya1805akava mukuru mukuru wevarwi kumukuru mukuru wehondo muGermany, Archduke Ferdinand Karl Joseph weAustria-Este, uyo akanga asina ruzivo mune zvehondo. Somuuyo, Mack akabata mutungamiriri chaiye ane mutoro wehondo yaishora Napoleon muBavaria, asi nzvimbo yake yakanga isina kunyatsojekeswa uye chiremera chake chakarapwa noruremekedzo ruduku navamwe vakuru vakuru. Uyezve, kugadziriswazve kwemauto evaHabsburg kwakanga kusati kwapera; Mack akasarudza kutanga zvimwe zvitsva zvaCharles, achiregeredza zvimwe. Kusagadzikana kwake uye kusagadzikana hazvina kukurudzira kuvimba kwevashandi; mumushandirapamwe wakatungamira kuHondo yeUlm, kudzokorora kwaMack kwehurongwa hweViennese, uye kunyange zvisarudzo zvake, zvakaderedzazve chimiro chehutongi chakanga chisina kusimba. 