Rochambeau's corps during the 1781 Yorktown campaign contained more than the four regiments cited above and included the following four brigades :
* Brigade de Bourbonnois under the Marquis de Laval : Rgts Bourbonnois & Royal Deux-Ponts - 2 btns each.
* Brigade de Soissonois under the Marquis de Maime : Rgts Soissonnois & Saintonge - 2 btns each.
* Brigade d'Agenois under the Marquis d'Audechamp : Rgts Agenois & Gatinois - 2 btns each.
* Brigade de Touraine under the Marquis de Pondeux : Rgt de Touraine - 2 btns.
The Marines and Légion de Lauzun were brigaded separately under the Marquis de Choisy.
Two years earlier in 1779, a French force of about 2,800 infantry was present at the siege of Savannah in Georgia, comprising detachments from Regts Agenois, Armagnac, Auxerrois, Cambresis, Champagne, Dillon, Foix, Gatinois, Hainault and Walsh along with colonial troops from Guadeloupe and Martinique.
So there are plenty of units to choose from depending on which part of the war you wish to do.