When the advancing line was held up by machinegun fire, 1st Sgt. Gumpertz left the platoon of which he was in command and started with 2 other soldiers through a heavy barrage toward the machinegun nest. His 2 companions soon became casualties from bursting shells, but 1st Sgt. Gumpertz continued on alone in the face of direct fire from the machinegun, jumped into the nest and silenced the gun, capturing 9 of the crew.