 Both marriages were childless and the title of duke became extinct on his death in 1725.In 1688, La Feuillade raised a cavalry regiment for the Nine Years War, taking part in the battles of Walcourt, Fleurus and Landen in 1693.The first of the controversies that accompanied his career occurred after Landen, when it was claimed he disappeared during the battle to 'faire sa toilette,' only re-emerging at the end.