As a soldier he received the usual training of a Prussian prince, obtained his lieutenancy in 1784, became a colonel commanding in 1790, and took part in the campaigns of 1792-94.
The only offices which Roman Catholics are not legally capable of holding now are the lord chancellorship of England and the lord lieutenancy of Ireland (see, however, Lilly and Wallis, pp. 36-43).
To the now nominal lieutenancy of Scotland.
He profited by his position at court to obtain the lieutenancy of the Bastille, the governorship of the duchy of Nemours, and the confiscated territories of Jean Larcheveque, seigneur of Parthenay.