Tuhia he tohutoro mō tēnei rārangi - I te tīmatanga o te French Revolution, i whakapakari a Tharreau i te take o te hurihanga. I te tau 1792, ka uru ia ki nga kaitohutohu a Maine-et-Loire, ana i muri mai i taua tau ko ia te kaitohutohu nui o te 2 o nga kaitohutohu a Mayence. I te tau 1794, i te tihi o te whakamataku French, ko ia he Tiamana o Brigade i te Army of the Ardennes. I te tau 1799, ko Jean Victor Tharreau he rangatira pirihimana i roto i te ope French o te Danube, ka whawhai i nga pakanga o Ostrach
me te Stockach Tuatahi. I te 20 o Paenga-whawha, i whakatairangahia ia ki te Tiamana o te Tiamana. I whakanohoia e André Masséna ki a ia te whakahau mo te raina whakamua, mo te tiaki i te taone nui o Switzerland o Zurich, i te tau 1799; ko te koretake o Jean-de-Dieu Soult i te Pakanga o Winterthur i te Mei 1799 i uru ki te koretake o Tharreau ki te pupuri i te raina whakamua, i akiaki i te reti French ki Zurich me te hinganga o nga French i te Pakanga Tuatahi o Zurich i te 4 ki te 7 o Pipiri.