A shekara ta IV, a matsayin colonel, ya yi yaƙi da Janar Bonaparte a cikin 1796-97. Ya yi yaƙi a yakin
Arcole a Italiya karkashin Napoleon, kuma ya halarci Siege na Kehl. Chambarlhac daga baya ya koma Italiya a 1799 kuma ya yi yaƙi a yakin Verona, yana aiki tare da Schérer.