Ramba uchinyora ndima iyi - Pakutanga kweRevolution yeFrance, Tharreau akashingaira kugamuchira nhau yechimurenga. Muna 1792, akabatana neMaine-et-Loire vanozvipira uye gare gare gore iroro akanga ari mukuru mukuru webato rechipiri revazvipiri veMayence. Muna 1794, pakakwirira pokuvhunduka kweFrance, akanga ari Brigade General muArmy of the Ardennes. Muna 1799, Jean Victor Tharreau akanga ari mutungamiriri webrigade muuto reFrance reDanube, uye akarwa muhondo dzeOstrach
uye First Stockach. Musi waApril 20, akasimudzirwa kuva General weDivision. André Masséna akamugadza kutungamira mutsara wepamberi, wekudzivirira guta reSwitzerland reZurich, muna 1799; kusateerera kwaJean-de-Dieu Soult muhondo yeWinterthur muna Chivabvu 1799 kwakabatsira mukutadza kwaTharreau kuchengetedza mutsara wepamberi, kumanikidza kudzokera kweFrance kuZurich uye kukundwa kwakazotevera kwevaFrance muhondo yekutanga yeZurich musi wa4 kusvika 7 Chikumi.