Tuhia he tomokanga mō tēnei wāhanga - I tohua a Klein hei rangatira o te wehenga i te tau 1799 a ka whiti i te awa o Rhine ki Kehl i roto i te ope a Jean-Baptiste Jourdans o te Danube. I whakahaua e ia te taha matau o te Kaitiaki Whakamua, i raro i te whakahau a François Joseph Lefebvre. Ko tana whakahau ko te 4th me te 5th Hussar Regiments, te 17th Dragons, te 1st "Chasseurs à cheval", he pere pere pere, e rua nga kamupene pere pere, e rua o nga pere pere, me tetahi kamupene o nga sappers. I te Pakanga o Ostrach
I te mutunga o te pakanga, i awhina te hoia eke hoiho a Klein ki te tiaki i te kainga o Hosskirch, he pou whakamua nui, i mua i te whakaeke whanui. Whai muri i nga hinganga French i Ostrach me te Pakanga o Stockach i muri mai, i whakahau a Jourdan kia wehe atu ki te Ngahere Pango. Ko te hoia eke hoiho me te nuinga o te wehenga a Klein i whakawhiti i nga maunga ka noho tata ki Offenburg, kei reira nga hoiho ka kitea he kai pai ake. Ahakoa i whakaritea te rerenga me nga tūnga haumaru i te taha ki te hauauru o te Ngahere Pango, he mea whakamataku te ope. I whakanohoia e Jourdan tana rangatira o nga kaimahi a Jean Augustin Ernouf hei rangatira mo te wa poto ka haere ki Paris ki te amuamu mo te ahua o tana ope, ona taputapu me ona taonga. I pakaru te whakatikatika i roto i nga rarangi. Ko te nuinga o nga rangatira wehenga i whakarere i a raatau pou, haunga a Pierre Marie Barthélemy Ferino, Joseph Souham, Dominique Vandamme me Klein. I te marama o Mei, i whakawhiwhia a Andre Massena ki te rangatira o te ope taua o te Danube me te ope taua o Helvetia; Ko te pou a Klein i uru atu ki Massena i te taha o Zurich.