He served as a junior officer in the War of the Spanish Succession and as brigadier in the campaign of 1734 on the Rhine and Moselle, where he won the grade of Maréchal de camp. He was employed under his brother in political missions in Bavaria and in Swabia in 1741–1742, became a lieutenant-general, fought in Bohemia, Bavaria and the Rhine countries in 1742–1743, and was arrested and sent to England with the marshal in 1744.
During the War of the Spanish Succession, he acted as a junior officer and brigadier during the 1734 campaign on the Rhine and Moselle. He earned the rank of Marshal of camp. In political missions in Bavaria and Swabia from 1741 to 1742 under his brother, he became a lieutenant-general, fought in Bohemia, Bavaria, and the Rhine countries from 1742 to 1743, and was detained and sent to England with the marshal in 1744.