Cpl. Heriot, with four other soldiers, organized a combat group and attacked an enemy machine-gun nest which had been inflicting heavy casualties on his company. In the advance two of his men were killed, and because of the heavy fire from all sides the remaining two sought shelter. Unmindful of the hazard attached to his mission, Cpl. Heriot, with fixed bayonet, alone charged the machine gun, making his way through the fire for a distance of 30 yards and forcing the enemy to surrender. During this exploit he received several wounds in the arm, and later in the same day, while charging another nest, he was killed.