Returning to France in July 1743, he ended his campaign in Basse-Alsace serving under Marshal de Noailles. In 1744 he was promoted to maréchal-de-camp and fought in the king's army at that rank, commanding the siege works at the 1745 siege of Tournay, fighting at the French victory at Fontenoy and serving at the sieges of Oudenaarde and Dendermonde. In 1746 he joined the French army in Flanders under the Marshal de Saxe, covering the sieges of Mons, Saint-Guilhain and Charleroi and serving at the sieges of Namur (1746) and the victory at Rocourt.