Saint-Germain commanded the II Cavalry Corps at the Battle of Vauchamps on 14 February 1814. It consisted of the 2nd Heavy Cavalry Division, also led by Saint-Germain, the 2nd Light Cavalry Division under General Sigismond Frédéric de Berckheim, and two horse artillery batteries. Saint-Germain led the 2,600-strong corps at the Battle of Laubressel on 3 and 4 March. General Antoine Maurin led the 2nd Light Cavalry Division.