La Trémoille joined the military and became a colonel of a regiment in his name.
[1] He also distinguished himself in the battle of Guastalla, in Italy, and was named shortly thereafter sergeant of the armies of the king.
[citation needed] La Trémoille was the author of some works and was elected a member of the Académie française on 13 February 1738.
[1] Marie Hortense, like her husband was a grandchild of Charles Belgique Hollande de La Trémoille.
From this union was born a son: Jean Bretagne Charles de La Trémoille and a daughter who died in infancy.