The best of the French anti-tank guns was the Canon de 46 antichar SA mie 1937, a design that originated with the Atelier de Puteaux, It was developed in a great hurry and introduced into service once the French army had been provided with indications of the armour thickness of the German PzKpfw IV tank, Considering the rush with which the mie 1937 was developed it was an excellent anti-tank weapon and one of the best in service anywhere in 1939. The main trouble for the French army was that there were not enough of them to hand during the events of May 1940.
The mie 1937 was introduced into limited service in 1938, but the main production run was in 1939. The type was issued to French artillery batteries operating in support of army divisions and brigades, and was operated in batteries, each battery having six guns. They were capable of penetrating the armour of any tank likely to be put into action against them.
May and June 1940 saw the bulk of the French mie 1937s pass into German hands, The Germans regarded the mie 1937 very highly, for many of their tanks had suffered from the striking power of the gun, and after 1940 they used the mie 1937 widely as the 4.7-cm Pak 141(f); the gun was still in service when the Allies landed in Normandy in June 1944. Before that the Germans had also used the mie 1937 to arm many of their early Panzerjäger (tank hunter) conversions produced by removing the turrets from captured French tanks and replacing them with anti-tank guns on open mountings.