 The type proved to be unsatisfactory and was phased out in 1953.During the German occupation some clandestine tank development took place in France, mostly limited to component design or the building of tracked chassis with either a pretended civilian use or with a "Kriegsmarine" destination.These efforts were coordinated by CDM ("Camouflage du Matériel"), a secret Vichy army organisation trying to produce matériel forbidden by the armistice conditions, with the ultimate goal of combining these components into the design of a possible future thirty ton battle tank, armed with a 75 mm gun.