He was a brigadier in Joseph Hélie Désiré Perruquet de Montrichard's division at the Battle of Magnano on 5 April 1799. His command included 1,000 French soldiers of the 3rd Line Demi-Brigade and 800 men of the 1st Battalion of the 2nd Polish Legion. The other brigadier in the division was Gaspard Amédée Gardanne. At 5:00 PM the village of Dossobuono was captured. Later that evening the Austrians launched a powerful counterattack which recaptured Dossobuono despite strong resistance by Partouneaux's brigade.