Production M.S.406s quickly followed the earlier examples. Between December 1938 and January 1939, the 6th Escadre exchanged its obsolete Loire 46 fighters for the type, while other units rapidly followed. By Bastille Day of that year, sufficient production M.S.406 aircraft had been delivered to enable the type to perform the Paris fly-past on 14 July 1939. Overall, the M.S.406 equipped 16 "Groupes de Chasse" and three "Escadrilles", stationed in both mainland France and across its overseas colonies; of these, 12 of the "Groupes" saw action against the "Luftwaffe".