the number is 79 nationals for 23 foreign regiments in the Infantry in 1789, the only Italian having previously disbanded one year before for the new Chasseurs Battalions
these 3 regiments, only one Italian, were not sent to the United States
Piémont is one of the oldest Regiments of the French Army, nothing to do with any "Italian" regiment, it is like to say that Navarre, also one of the oldest French Regiment, is spanish
Perche, just to recall that the name of the Regiment comes from a county near Normandy, so a touch of french culture and geography would be enough to explain how much is ridiculous to consider the regiment as italian
The French "Italian" and Corsican Regiments were only at that time Royal-Italien and Royal-Corse, both regiments were briefly merged into a single-one in 1762-1765 but given bad relationships between peninsular Italians and insular Corsicans the merging was cancelled 3 years later
it didn't wear brown since 1750 but a kind of dark light blue
Royal Italien was at Monaco at the beginning of AWI in 1775 having only one battalion, upgraded to a two-battalions-regiment by merging it with…Tournaisis a French regiment…
Royal-Italien remained in the Mediterranean coast Toulon Perpignan and southwestern Atlantic coast La Rochelle, Oleron…
it counted the future Marshall Masséna
Royal Italien detached some men for the French Fleet as it happened for several regiments, that is why you cand find a list of 89 men of the Royal Italien embarked on the vessel Le Glorieux with de Grasse in the West Indies, they are not all italians because some have clearly french names
if you find Italians in others regiments it is only because there were some foreigners among the 79 national French Infantry Regiments as well as there were French in the 12 German Irish Italian Regiments that's all, just browse on-line contôles de troupes but there was not other Italian unit than the Regiment Royal-Italien being even itself partially french