In 1916, the Hotchkiss M1909 Benét-Mercié machine gun was in general use with the U.S. Army and was seeing action during the Punitive Expedition against the bandit Pancho Villa. Reports of its use in Mexico indicated the gun was not functioning properly. Investigation revealed that the chief problems were the 30-round metallic feed strips used in the gun and inexperienced gunners. It was Lieutenant Hatcher who was sent to the border to solve the problems. He found that none of the soldiers had been taught the proper use of the weapon. He set up the Army's first machine gun school and was soon turning out trained crews. Soon, the Benét-Mercié proved to be an effective weapon.