Rubuta ci gaba ga wannan sakin layi - A ranar 4 ga Yuni, 1799, Brigade na 100th Demi ya yi yaƙi a cikin rukunin 4th a Yaƙin farko na Zurich. Laval ya ci gaba da zama janar na brigade kasa da mako guda daga baya a ranar 10 ga Yuni, 1799. A Yaƙin Zurich na Biyu
a ranar 25 da 26 ga Satumba 1799, ya jagoranci brigade a cikin Nicolas Soult's 3rd Division. Soult ta 11,000 sojojin haye Linth River, mamaki da kuma kayar da 13,000 Austrian da Rasha kare. Nasarar ta haifar da mutuwar kwamandan Austrian Friedrich Freiherr von Hotze da kuma yanke hanyar tserewa ta Alexander Suvarov. A karkashin umurnin Honoré Théodore Maxime Gazan, Rukunin na 3 ya shiga cikin ƙoƙarin da ba a yi nasara ba don kama sojojin Suvarov a cikin Alps. Daga 30 ga Satumba zuwa 5 ga Oktoba, an yi yaƙe-yaƙe a Klöntalersee, Muotathal, Näfels, da Schwanden.