I'm actually interested in the life of Jean Denis Florimond Langlois, marquis du Bouchet, later to become "Langlois de Mautheville".
I know he'd been fighting in the American War of Independance alongside the rebels at first, then as an officer in Rochambeau's expeditionnary corps later. He then went back to France, and was a colonel at the time of the French Revolution. He'd emigrated in 1795 to serve in the armée de Condé. He made three campaigns in this army against his revolutionnary fellow citizen, and is promoted maréchal de camp on December 31st, 1797. So we may considered he was still in Europe in early 1798 ...
Then, both his biographies in the Dictionnaire des biographies françaises(t.11) and the Dictionnaire des colonels de Napoléon, are saying that he came back in France in 1803, thanks to Bonaparte's amnesty for the emigrates.
My question is: where was he between 1798 and 1803? Did he fled in another European country still at war with France (Austria, England, Russia, Portugal, ...) after the armée de Condé was suppressed? Od did he went to exile in the USA, where he may have create ties when he fought there?
If I'm doing those researches, it is because I'd found in general Leclerc's expeditionnary corps to Saint-Domingue (1802), a colonel Langlet. This officer has been sent back to France by Leclerc, not for any fault, but because he was too old for that kind of colonial campaign. I know that several noble officers that had exiled in the USA(especially those that fought during the AWI), used Leclerc's EX. Corps to reintegrate the French army after the amnesty: Tousard, de Noailles, ...
Langlois & Langlet being very close in pronunciation in French, I thought it could be the same man, exiled in the USA, that went to Saint-Domingue in 1802 to enlist in Leclerc's staff. Being too old, the latter would have sent him back to France, where he served during the Empire as a place commander.
Is there anyone in this forum that could validate or invalidate this "theory"?

Matthieu