 Nekubuda kweHondo yeChitatu Chibvumirano, Dupas akapiwa basa muGrande Armée, achitungamirira kurwisa kukuru paHondo yeAusterlitz, uko varume vake vakabatsira pakumanikidza maRussia zviuru zvishanu kuti vazviise pasi. Nokuda kwechiito ichi, akakwidziridzwa kuva General weDivision, asati atora chikamu muHondo yeChishanu yeChishanu ye 1806-1807, uko akacherechedzwa pamusoro pezvose nokuda kwezviito zvake zvine simba muhondo yeStraslunduye Hondo yeFriedland. Akagadzirwa Count of the Empire pakutanga kwa 1809 uye akarwa muhondo huru yeWagram muna Chikunguru wegore iroro. Dupas akabva aiswa pamutsara wevakasiya basa, nekuda kwekurwara kwakasiyana-siyana kwaakatambura nako, zvichitevera kukuvara kwake kwakawanda muhondo. Akayeuchidzwa muna 1813 nokuda kweHondo yeChitanhatu Chibvumirano, asi akaiswa zvachose pane mazita akasiya basa munaNovember wegore iroro. Akasiya basa kuChateau de Ripaille muThonon-les-Bains kwaakafira musi wa6 Kurume 1823. 