[1] The prince was a member of the Jacobin Club, and sat in the National Constituent Assembly after the French Revolution, constantly voting on the Liberal side.
He served as chief of the staff to the First Republic's Army on the Rhine, but, during the Reign of Terror, he was denounced, arrested, and guillotined in Paris.
The prince's dying admonition to his little son was to remain faithful to the principles of the Revolution, however unjust and ungrateful it seemed then to be.
[1] The prince's wife shared her husband's imprisonment, but managed to escape to Switzerland, where she remained till the fall of Robespierre.
She then returned to Paris with her children and lived there quietly until 1796, when she married Marc-René de Voyer de Paulmy d'Argenson, grandson of the Comte d'Argenson (minister of war during the reign of Louis XV).