Nyorai kuenderera mberi kweiyi ndima - Klein akagadzwa general wechikamu muna 1799 uye akayambuka Rhine paKehl muuto raJean-Baptiste Jourdans reDanube. Akatungamirira divi rokurudyi reAdvance Guard, raiva pasi paFrançois Joseph Lefebvre. Mutungamiri wake waisanganisira 4th uye 5th Hussar Regiments, 17th Dragoons, 1st "Chasseurs à cheval", regiment yemabhiza akareruka, makambani maviri emabhiza epfuti, maviri epfuti dzetsoka, uye kambani yevashandi. Muhondo yeOstrach
, mabhiza aKlein akabatsira kuchengetedza musha weHosskirch, nzvimbo yakakosha yekumberi, pamberi pekubatana kwese. Pashure pokurasikirwa kweFrance paOstrach uye Hondo yeStockach yakatevera, Jourdan akarayira kuti vanhu vose vadzokere kuBlack Forest. Vatasvi vamabhiza vechivande nechikamu chikuru cheboka raKlein vakayambuka makomo ndokugara pedyo neOffenburg, uko mabhiza avo aigona kuwana zvokudya zviri nani. Pasinei zvapo nokudzokera shure kwakarongwa uye nzvimbo dzakachengeteka zvikuru kurutivi rwokumadokero rweBlack Forest, uto rakanga rakaparadzana. Jourdan akaisa mukuru wake wemauto Jean Augustin Ernouf mukutungamira kwenguva pfupi uye akaenda kuParis kunonyunyuta pamusoro pemamiriro ehondo yake, midziyo yayo nemigove yayo. Kuranga mumapoka kwakaparara. Vazhinji vevakuru vemapoka vakasiya mabasa avo, kunze kwaPierre Marie Barthélemy Ferino, Joseph Souham, Dominique Vandamme naKlein. Muna Chivabvu, Andre Massena akagamuchira kutungamira kwese kweDanube Army uye Hondo yeHelvetia; Chikamu chaKlein chakabatana naMassena padyo neZurich.