An interesting purchase since I don't do either Napoleonics nor French.
And busby hat and Napoleonic look was popular with the US Army all during the 1800's and even to today. So these will become American troops. http://www.military-historians.org/company/plates/images/471.htm This link shows how these American troops dressed as a cavalry unit. They were in existence until about 1940 as far as I can tell. My plan is to create a small force and use them for my War of the World games for 1898, 1918 and 1938. There may be some additional conversion work and painting done as well, but the headgear was essential for the look.