Kammala jumla mai zuwa: A lokacin dawowarsa bai shiga cikin yakin Marengo ba, inda aka kashe abokinsa Desaix yayin da yake ba da gudummawa mai mahimmanci ga nasarar. Napoleon, wanda yake da babban kwarin gwiwa a cikin ikonsa, a ƙarshe ya ba shi mukamin janar na rukuni kuma ya shirya aurensa ga 'yar'uwarsa Pauline's sister-in-law Aimée Leclerc, don haka ya zama wani ɓangare na dangin Napoleon, kuma ya ba shi umurni a cikin masu tsaron jakadancin. A lokacin da Napoleon ya zama sarki a shekara ta 1804, an ambaci Davout a matsayin daya daga cikin 18 na farko na Marshals na Empire. Davout shine mafi ƙanƙanta kuma mafi ƙarancin ƙwarewa na janar din da aka inganta zuwa marshal, wanda ya sa ya sami ƙiyayya daga sauran janar a duk lokacin aikinsa. A matsayin kwamandan rundunar III na "Grande Armée", Davout ya ba da mafi girman ayyukansa. A yakin Austerlitz, bayan da aka tilasta tafiya na sa'o'i 48, III Corps ya ɗauki nauyin hare-haren abokan gaba. A cikin bayanan da suka biyo baya
Yaƙin Soja na Hudu, Davout, tare da runduna ɗaya, ya yi yaƙi kuma ya ci nasarar Yaƙin Auerstädt a kan babban rundunar sojojin Prussia, wanda ke da sojoji fiye da ninki biyu (fiye da 63,000, ga Davout's 28,000). Masanin tarihi François-Guy Hourtoulle ya rubuta: "A Jena, Napoleon ya ci nasara a yaƙin da ba zai yi nasara ba. A Auerstädt, Davout ya ci yaƙin da ba zai iya cin nasara ba". A matsayin lada, Napoleon ya bar Davout da mutanensa su fara shiga Berlin a ranar 25 ga Oktoba, 1806.