Whakaotihia te rerenga e whai ake nei: He uri rangatira no Burgundian, he ākonga ia i te kura hōia o Brienne, kātahi ka puta ia i te kura hōia o Paris. I timata a Nansouty i tana mahi hoia i te 1785, hei kaitiaki tuarua i roto i te roopu "Bourgogne-Infanterie", i mahi ai tona papa i nga pakanga o Louis XV. He rangatira hoiho i te pakarutanga o nga Pakanga French Revolutionary i te tau 1792, i tukuna a Nansouty hei "aide-de-camp" ki a Marshal Nicolas Luckner. I roto i te
Ko te Whakakotahitanga Tuatahi, i kite ia i te ratonga hei kaikawe-koronel me te rangatira o te roopu i roto i te 9th (heavy) Cavalry Regiment, e pakanga ana me nga ope French i runga i te Rhine me Tiamana. I whakatairangahia ia ki te Koronela i te tau 1793 ka whakawhiwhia ki a ia te whakahau o te 9th Cavalry, i mohiotia ia mo nga mahi kaieke hoiho pai. I te mutunga i whakawhiwhia ki a Brigadier General i te tau 1799, i muri i tana whakakahore i te whakatairanga i nga wa maha i mua, i whawhai a Nansouty i te tau e whai ake nei i raro i a General Jean Victor Moreau i te tonga o Tiamana, i roto i te kaupapa whakatau o te Tuarua o te Whakawhanaunga.