In 1800 Digonet was assigned to the "Army of the Rhine" under Jean Victor Marie Moreau and fought at the Battle of Stockach-Engen. Digonet and Pierre François Joseph Durutte were the two brigadiers in the division of Antoine Richepanse in the Army Reserve. The division was made up of the 4th, 50th and 100th Line Infantry Demi Brigades, the 13th Cavalry, 17th Dragoon and 5th Hussar Regiments and a combined grenadier battalion for a total of 6,848 foot and 1,187 horse. At the Battle of Messkirch on 5 May 1800, Moreau brought the Reserve into action late in the day. Austrian commander Paul Kray launched an attack that threatened to cut the Stockach road. Richepanse arrived on the battlefield and took Ignaz Gyulai's division in flank, driving it back. Kray gave up his effort to break down the French flank and retreated to the Danube at Sigmaringen. Digonet was present at the Battle of Biberach on 9 May. While Moreau took charge of the left wing, Laurent Gouvion Saint-Cyr took his own corps plus the Reserve and attacked the Austrians at Biberach an der Riss. The move was successful and the French captured the Austrian supply base in the city.