Kammala jumla mai zuwa: An haife shi a cikin dangin aristocratic na Ancien Régime, an shigar da Desvaux a Makarantar Makamai ta Châlons a 1792, kafin ya shiga Sojojin Alps, wanda zai shiga cikin kewaye da Lyon. Daga nan sai ya yi aiki a karkashin jagorancin Janar Jacques François Dugommier a cikin Sojojin Gabas ta Gabas-Pyrenees, kafin a nada shi mataimakin Janar Saint-Rémy a watan Janairun 1796 kuma aka tura shi zuwa Italiya. Zai shiga cikin ayyukan soja da yawa tsakanin 1798 <unk> 1799, mafi mahimmanci a Novi da
Mincio, ka yi haƙuri. Ya zama mai taimakawa ga Janar Auguste de Marmont kuma an daukaka shi zuwa matsayin colonel a 1803, yana shiga cikin kewaye da Ulm, inda aka ji masa rauni, kafin abokan gaba su kama shi a yakin Judenburg. An sake shi bayan Yarjejeniyar Pressburg a ƙarshen 1805, ya yi shekara mai zuwa yana aiki a matsayin kwamandan sojojin Faransa a Dalmatia sannan Friuli. A cikin 1809, ya shiga cikin Yaƙin Haɗin Gwiwa na Biyar kuma an ɗaukaka shi zuwa brigadier janar; bayan ƙarshen yaƙin neman zaɓe a Ostiryia, an ba shi umurnin manyan sojojin doki na doki na Tsaron Tsaro. Wani baron na Daular daga 1810, Desvaux ya jagoranci umurninsa a cikin Tsaro kuma ya kasance wani ɓangare na Grande Armée a lokacin yakin Rasha da kuma yakin yakin na shida. An daukaka shi zuwa janar na rarrabuwa a watan Nuwamba na 1813 kuma a 1814, a lokacin yakin Faransa, an ba shi umurnin bindigogi na rundunar Lyon, a karkashin Marshal Pierre Augereau. A lokacin Kwana ɗari, Desvaux ya shiga Napoleon kuma an ba shi umurnin dukan sojojin dakarun. An kashe shi a yakin Waterloo. An rubuta sunansa a ƙarƙashin Arc de Triomphe, Northern Pillar.