After his platoon had gained its objective along a railroad embankment, Pfc. Dilboy, accompanying his platoon leader to reconnoiter the ground beyond, was suddenly fired upon by an enemy machine gun from 100 yards. From a standing position on the railroad track, fully exposed to view, he opened fire at once, but failing to silence the gun, rushed forward with his bayonet fixed, through a wheat field toward the gun emplacement, falling within 25 yards of the gun with his right leg nearly severed above the knee and with several bullet holes in his body. With undaunted courage he continued to fire into the emplacement from a prone position, killing two of the enemy and dispersing the rest of the crew.