Kammala jumla mai zuwa: Lannes ya yi aiki a karkashin Janar Barthélemy Louis Joseph Schérer, yana shiga cikin yakin Loano. Koyaya, a cikin 1795, sakamakon gyare-gyaren rundunar da Thermidorians suka gabatar, an kore shi daga matsayinsa. Ya sake yin rajista a matsayin mai sa kai mai sauƙi a cikin Faransanci "Armée d'Italie". Ya yi aiki a yakin Italiya na 1796, kuma ya sake hawa zuwa matsayi mai girma, ana ba shi umurnin brigade a Janar Pierre Augereau's division da kuma daga baya na 3 battalions na dindindin mai tsaro a lokuta daban-daban. Lannes ya yi fice a kowane yaƙi kuma ya taka muhimmiyar rawa a cikin
nasara a Dego. A Yaƙin Bassano, ya kama tutar abokan gaba biyu da hannunsa kuma ya sami raunuka da yawa a Yaƙin Arcole amma ya ci gaba da jagorantar rukunin sa da kansa.