The Canon d'Infanterie de 37 modèle 1916 TRP (37mm mle.1916) was a French infantry support gun, first used during World War I. The French Army still had the cannon in service in 1940 as a substitute for the 25 mm Hotchkiss anti-tank gun, which was in short supply. After the defeat of France by Germany, the Wehrmacht began using the TRP under the designation 3.7 cm IG 152(f).
The 37mm Anti-tank gun was still in service in the French Army when the Germanspushed intoFrance in early 1939. Sgt. Ludwig Rothe found them tough to take out because of their armoured shield, but not impossible. He also knew that they were more than capable of punching through the armour of not only a Panzer I, but his own Panzer II.