He held the title of duc de Caumont until the death of his father, then assumed the title of duc de La Force at the closing of parliament 5 August 1700. He also held the titles of
comte de
Mussidan,
baron de Castelnau, Caumont, Tunneins, Samazin, Feuillet, Taillebourg, Boësse, Cugnac, Roquepine, Maduran and la Boulaye. He was a colonel of a regiment of his name, as well as a councillor to the councils of
regency and finance. In 1712 La Force was a founder and the first patron of the Académie Nationale des Sciences, Belles–Lettres et Arts de Bordeaux. He became a member of the Académie française in 1715, replacing
Fabio Brulart de Sillery. He was elected to seat 7 of the Académie on 19 January 1715 and was received by Abbot
Jean d'Estrées on 28 January 1715. He was vice-chairman of the
Board of Finance in 1716, and deputy
finance minister from 1718 to 1719. He had trouble with the
Parliament for its complicity in the bankruptcy law. He died on 20 July 1726 and he was buried in his duchy in
Périgord. He was succeeded by his younger brother,
Armand-Nompar. His widow died on 16 November 1752. The Hôtel de La Force, his former residence, stood alongside the Rue du Roi de Sicile, in what is today's
4th arrondissement of Paris. The
war ministry acquired it in 1754 and in 1780 it became
La Force Prison. ==Footnotes==