Rubuta ci gaba don wannan sakin layi - Lannes yayi aiki a ƙarƙashin Janar Barthélemy Louis Joseph Schérer, yana shiga cikin Yaƙin 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 bambanta a kowane yaƙi kuma ya taka muhimmiyar rawa a nasara a Dego. A yakin Bassano, ya kama tutar abokan gaba biyu da hannunsa kuma ya sami raunuka da yawa a yakin Arcole
amma ya ci gaba da jagorancin sa a cikin mutum.