In 1795, Montrichard was promoted to chef de brigade and in June of 1796 he was ordered to prepare for the crossing of the Rhine at Strasbourg.

Next Montrichard served at the crossing of the Lech and then in September he was ordered to protect the retreat of General Jean Victor Marie Moreau at Ulm.

In April of 1797, Montrichard began serving in the division of Jean Pierre Girard-dit-Vieux [fr] and then at the end of the year he became chief of staff of the Army of Mainz.

Taking command of the right wing of the Army of Italy, Montrichard served at Pastrengo in March and then Magnano in April.

Once hostilities resumed in the winter, he crossed the Inn at Neubeuern in December and then battled the Austrians at Götzing, Salzburg, and Kremsmunster.

In January 1808, Montrichard returned to duty by joining the Army of Dalmatia under General Auguste de Marmont.

After the army reunited with Napoleon's forces in Austria, Montrichard was given command of the isle of Lobau after the Battle of Wagram.