French-made Canon d'Infanterie de 37 modèle 1916 TRP deployed by US troops circa 1918

The Canon d'Infanterie de 37 modèle 1916 TRP (37mm mle.1916) was a French infantry support gun, first used during World War I. TRP stands for tir rapide, Puteaux ("fast-firing", designed by the Puteaux arsenal).

The modèle 1916 gun's 37mm caliber was the smallest allowed for explosive shells under the 1899 Hague Convention and hence was used by many nations for small guns. In U.S. service, each gun was assigned an ammunition limber, which carried 14 boxes containing 16 rounds of ammunition each as well as tools and accessories. The gun and its limber were normally together towed by a single horse or mule, but were manhandled forward if contact with the enemy was expected.

During the First World War, the guns saw widespread use with both French and United States forces and were designated the 37mm M1916 in U.S. service. In combat they were found to be wanting, and it was found their intended task of destroying gun emplacements was better done by mortars. As well as infantry use, the guns were also fitted to the M1917 light tank, the first mass-produced U.S. tank. These tanks entered service too late for World War I, and none ever saw action.