His Regiment of Los Rios participated in the Battle of Rocourt and covered the retreat of the Dutch infantry. It participated in the Battle of Lauffeld. With the same Regiment, he defended the city of Maastricht, during the Siege of Maastricht (1748), led by the "Maréchal of France" Maurice de Saxe. It caused heavy losses to the French army during the heroic night of 1–2 May 1748.