He was commanding the 2d Battalion, 8th Infantry, in an attack through the Hurtgen Forest near Schevenhutte, Germany, on 20 November 1944. During the early phases of the assault, the leading elements of his battalion were halted by a minefield and immobilized by heavy hostile fire. Advancing alone into the mined area, Col. Mabry established a safe route of passage. He then moved ahead of the foremost scouts, personally leading the attack, until confronted by a booby-trapped double concertina obstacle. With the assistance of the scouts, he disconnected the explosives and cut a path through the wire. Upon moving through the opening, he observed three enemy in foxholes whom he captured at bayonet point. Driving steadily forward he paced the assault against three log bunkers which housed mutually supported automatic weapons. Racing up a slope ahead of his men, he found the initial bunker deserted, then pushed on to a second where he was suddenly confronted by nine onrushing enemy. Using the butt of his rifle, he felled one adversary and bayoneted a second, before his scouts came to his aid and assisted him in overcoming the others in hand-to-hand combat. Accompanied by the riflemen, he charged the third bunker under point-blank small-arms fire and led the way into the fortification from which he prodded six enemy at bayonet point. Following the consolidation of this area, he led his battalion across 300 yards of fire-swept terrain to seize elevated ground upon which he established a defensive position which menaced the enemy on both flanks, and provided his regiment a firm foothold on the approach to the Cologne Plain. Col. Mabry's superlative courage, daring, and leadership in an operation of major importance exemplify the finest characteristics of the military service.