He manned a light machine gun on 20 August 1944, near Chambois, France, a key point in the encirclement which created the Falaise pocket. During an enemy counterattack, his position was menaced by a strong force of tanks and infantry. His fire forced the infantry to withdraw, but an artillery shell knocked out his gun and wounded him in the right thigh. Securing a bazooka, he and another man stalked the tanks and forced them to retire to a wooded section. In the lull which followed, Sgt. Hawk reorganized two machine-gun squads and, in the face of intense enemy fire, directed the assembly of one workable weapon from two damaged guns. When another enemy assault developed, he was forced to pull back from the pressure of spearheading armor. Two of our tank destroyers were brought up. Their shots were ineffective because of the terrain until Sgt. Hawk, despite his wound, boldly climbed to an exposed position on a knoll where, unmoved by fusillades from the enemy, he became a human aiming-stake for the destroyers. Realizing that his shouted fire directions could not be heard above the noise of battle, he ran back to the destroyers through a concentration of bullets and shrapnel to correct the range. He returned to his exposed position, repeating this performance until two of the tanks were knocked out and a third driven off. Still at great risk, he continued to direct the destroyers' fire into the Germans' wooded position until the enemy came out and surrendered. Sgt. Hawk's fearless initiative and heroic conduct, even while suffering from a painful wound, was in large measure responsible for crushing two desperate attempts of the enemy to escape from the Falaise pocket and for taking more that 500 prisoners.