In April 1800 Montrichard took command of the 2nd Division of Claude Lecourbe's corps in the Army of the Rhine. That May he served at Stockach, Messkirch, and Memmingen and then in June he served at Höchstädt. Later in June Montrichard took command of the 2nd Division and he served at the battle of Neuburg. Once hostilities resumed in the winter, he crossed the Inn at Neubeuern in December and then battled the Austrians at Götzing, Salzburg, and Kremsmunster. After peace had been obtained, in late 1801 Montrichard began serving in Switzerland. In 1802 he was sent to command the French troops in the Batavian Republic and then in 1803 he was sent to Breda, the camp of Nimègue, and Hanover. Montrichard's next major career movements were to pass to Italy as commander of the French and Italian troops in the Papal States and then command a division of the army employed in Naples. In December 1805 he was suspended from his functions and put on non-activity for having levied a contribution of 100,000 piastres on the March of Ancona.