Tuhia he tomokanga mo tenei irava - I whanau mai i roto i te whanau rangatira o te Ancien Régime, i uru a Desvaux ki te Kura o Châlons i te tau 1792, i mua i tana urunga ki te ope taua o nga Alps, ka uru atu ia ki te whakapae o Lyon. I mahi ia i raro i te whakahau a te rangatira o Jacques François Dugommier i roto i te Army of the Oriental-Pyrenees, i mua i tana whakaingoatanga hei kaitohutohu ki te rangatira o Saint-Rémy i te Hanuere 1796 ka tukuna ki Itari. Ka whai waahi ia ki etahi mahi hoia i waenga i te 1798 me te 1799, ko te mea nui i Novi me Mincio
He aha? Ka noho ia hei kaihauturu ki a Auguste de Marmont, ka whakatairangahia ki te taumata koromatua i te tau 1803, ka uru atu ki te whakapae o Ulm, i whara ai ia, i mua i tana mauheretanga e te hoariri i te pakanga o Judenburg. I tukuna mai i muri i te Tiriti o Pressburg i te mutunga o te tau 1805, i noho ia i te tau e whai ake nei hei rangatira mo te puhipuhi French i Dalmatia, katahi ka Friuli. I te tau 1809, i uru ia ki te Pakanga o te Tuarima o nga Kaituku, a ka whakatairangahia ia ki te rangatira o te brigadier; i muri i te mutunga o te pakanga i Austria, i whakawhiwhia ki a ia te mana o te pere pere rongonui o te Kaitiaki Imperial. He rangatira o te Emepaea mai i te tau 1810, i whakahaerehia e Desvaux tana whakahau i roto i te Kaitiaki me te waahanga o te Grande Armée i te wa o te Whakatairanga a Ruhia, katahi ano te Pakanga o te Ono o nga Whawhai. I whakatairangahia ia ki te rangatira o te wehenga i te marama o Noema 1813 a i te tau 1814, i te wa o te pakanga o France, i whakawhiwhia ki a ia te whakahau o te pu o te ope o Lyon, i raro i te Marshal Pierre Augereau. I nga ra kotahi rau, ka uru a Desvaux ki a Napoleon, ka whakawhiwhia ki a ia te mana o te patu patu katoa o te Kaitiaki. I mate ia i te pakanga o Waterloo. Kua tuhia tōna ingoa ki raro i te Arc de Triomphe, Northern Pillar.