[5] The gun and its limber were normally together towed by a single horse or mule,[3] but were manhandled forward if contact with the enemy was expected.

U.S. high explosive ammunition for the TRP was the Mark II HE shell with a projectile weighing 0.67 kilograms (1.5 lb) and a TNT bursting charge of 27.2 grams.

[6] The French Army used the Obus explosif Mle1916 HE round with a projectile weighing 0.555 kilograms (1.22 lb) and a bursting charge of 30 grams.

The Army adopted a .22 caliber sub-caliber device as an economic measure that allowed training with the guns on indoor ranges.

[citation needed] 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.

The prototype 1917 British Beardmore W.B.V shipborne fighter was fitted with a 37mm for use against airships,[10] but the gun was considered dangerous and removed.