Re: Col. Armand of Rev War PA

d'Armand Tuffin is, I believe, the "Col. Armand" you seek.
He is from Fougeres, France (Brittany) and a statue of him exists in Fougeres in front of his family home. I have a picture of the statue which bears a plaque recognizing his service in the revolution of the American Colonies. During the French revolution, he also served the Republique. I'm sure that someone in Fougeres can help you further.
Kindest regards, JHS