<prompt> Bhala okuqhubekayo kwalesi sigaba - Wazalelwa emndenini wezicukuthwane we-Ancien Régime, uDesvaux wangeniswa eSikoleni Sase-Artillery saseChâlons ngo-1792, ngaphambi kokujoyina i-Army of the Alps, lapho ayezobamba khona iqhaza ekuvinjezelweni kweLyon. Wabe esekhonza ngaphansi komyalo ka-General Jacques François Dugommier e-Army of the Oriental-Pyrenees, ngaphambi kokuba aqokwe njengomsizi ka-General Saint-Rémy ngoJanuwari 1796 futhi wathunyelwa e-Italy. Wayezobamba iqhaza ezimpini eziningana zempi phakathi kuka-1798 no-1799, okuphawuleka kakhulu eNovi naseMincio  <response>: . futhi. Ube ngumsizi ka-General Auguste de Marmont futhi wakhushulelwa esikhundleni sokuba ngu-colonel ngo-1803, wabamba iqhaza ekuvinjezelweni kwe-Ulm, lapho alimala khona, ngaphambi kokuthunjwa yisitha empini yaseJudenburg. Ekhululiwe ngemuva kweSivumelwano SasePressburg ekupheleni kuka-1805, wachitha unyaka olandelayo ekhonza njengomlawuli wezikhali zaseFrance eDalmatia bese kuba yiFriuli. Ngo-1809, wabamba iqhaza eMpini Yesihlanu Yobumbano futhi wakhushulelwa esikhundleni sokuba yi-brigadier general; ngemuva kokuphela komkhankaso e-Austria, wanikezwa umyalo wezikhali ezihlonishwayo zamahhashi we-Imperial Guard. U-Baron we-Empire kusukela ngo-1810, uDesvaux wabamba iqhaza lakhe ku-Guardi futhi wayeyingxenye yeGrande Armée ngesikhathi se-Russian Campaign bese kuba yiMpi YeSithupha. Wakhushulwa waba yi-general of division ngoNovemba 1813 futhi ngo-1814, ngesikhathi se-Campaign of France, wanikezwa umyalo wezikhali zempi ye-Army of Lyon, ngaphansi kukaMarshal Pierre Augereau. Phakathi nezinsuku eziyikhulu, uDesvaux wajoyina uNapoleon futhi wanikezwa igunya lokulawula lonke ibutho elihlomile labaGcini. Wabulawa empini eWaterloo. Igama lakhe libhalwe ngaphansi kwe-Arc de Triomphe, eNorthern Pillar. 