Claim: As a young man, Louis (born in January 1770) served in France as a Lieutenant under his father during the revolution; and was Colonel commandant of the 2nd Regiment of Swiss Guards in the French Royal Service.
Evidence: Known as , he was born in 1770 at Paris. As a young man, Louis served in France as a Lieutenant under his father during the revolution. He served with distinction, was knighted, and at the breaking out of the French Revolution, was Colonel commandant of the 2nd Regiment of Swiss Guards in the French Royal Service, that corps being the personal bodyguards of King Louis XVI during the revolution.