Back in the first half of the C17th, the white flag was originally a means of distinguishing the old - and therefore most prestigious - infantry regiments from the more recently raised units. The white flag was originally conditioned by the existence of a compagnie colonelle, which received a drapeau colonel paid for by the colonel général de l'infanterie, who oversaw the whole of the French infantry. The more recent corps which were not entitled to a compagnie colonelle were restricted to coloured flags known as the drapeaux d'ordonnance. All this changed in 1661 when the office of the colonel général was abolished and all infantry regiments, including those who did not have a compagnie colonelle, became entitled to a white flag.
Each regiment possessed only one white flag, which was carried by the first battalion along with a coloured drapeau d'ordonnance. 2nd, 3rd and 4rth battalions (if any) carried two coloured drapeaux d'ordonnance apiece, a rule which suffered no exception.
Since nearly all French regular infantry units deployed in Canada in the late 1750's were second or third battalions, none of them had white drapeaux colonels except Royal-Roussillon. The full list is as follows :
* La Reine (2nd batt.)
* Guyenne (2nd batt.)
* Berry (2nd & 3rd batts.)
* Béarn (2nd batt.)
* La Sarre (2nd batt.)
* Royal Roussillon (1st batt.)
* Languedoc (2nd batt. - a wing of the 1st battalion was sent to Canada but was captured while crossing the Atlantic. The bulk of the 1st battalion was in Germany along with the white flag)