Kammala jumla mai zuwa: Guyot ya shiga cikin Yaƙe-yaƙe na Uku da na Hudu tare da Grande Armée, yana riƙe da mukamin kwamandan rundunar soja a cikin rundunar "chasseurs-à-cheval" kuma an san shi da ƙarfin hali a Austerlitz da Eylau. Ya yi yaƙi a ƙaramar Yaƙin Waren-Nossentin a ranar 1 ga Nuwamba 1806. Wani colonel a cikin Tsaro na Imperial a 1807, an kirkiro shi a matsayin Baron na Empire a shekara mai zuwa kuma an ba shi matsayi a cikin Lefebvre-Desnouettes's Guard light cavalry, yana jagorantar rakiyar Sarkin sarakuna a lokacin wannan kamfen na ɗan gajeren lokaci a Spain. A cikin 1809, bayan mummunan yakin Aspern-Essling, an ba Guyot aikin kwamandan kwamandan Kwamandan "chasseurs-à-cheval" kuma makonni shida bayan haka ya jagoranci sanannen caji a yakin Wagram. Wannan aikin zai kawo masa matsayi na brigadier janar. Wani Chamberlain na Sarkin sarakuna Napoleon I daga Maris 1810, an tura shi zuwa Spain, inda ya sami ci gaba zuwa janar na rarrabuwa a 1811. A lokacin yakin Rasha da kuma yakin da ya biyo baya na Coalition na shida, Guyot zai yi aiki a matsayin kwamandan masu gadi "chasseurs-à-cheval". A cikin yakin 1813 a Saxony, ya ji rauni a
Ya yi nasara sosai a yakin Bautzen, kafin ya zama fursuna a yakin Kulm, a watan Agusta. An sake shi bayan musayar fursunoni, Guyot ya shiga cikin babban yaƙin Leipzig, kafin a sanya shi a matsayin mai ƙididdigar Daular a watan Nuwamba na wannan shekarar. Yaƙin neman zaɓe na 1814 a Faransa ya ga Janar Guyot a tsakiyar aikin, yana ba da umarnin sojan doki a La Rothière, Champaubert da Craonne.