He was the leading element when grenade explosions and concentrated machine-gun and mortar fire halted the unit's attack on Kakazu Ridge, Okinawa, Ryukyu Islands. With utter disregard for his personal safety, he charged 40 yards through withering, grazing fire and wiped out two machine-gun nests with well-aimed grenades and deadly accurate fire from his automatic rifle. When strong counterattacks and fierce enemy resistance from other positions forced his company to withdraw, he voluntarily remained behind with eight others to cover the maneuver. Fighting from a critically dangerous position for three hours, he killed more than 25 Japanese before following his surviving companions through screening smoke down the face of the ridge to a gorge where it was discovered that one of the group had been left behind, wounded. Unhesitatingly, Pvt. Moskala climbed the bullet-swept slope to assist in the rescue, and, returning to lower ground, volunteered to protect other wounded while the bulk of the troops quickly took up more favorable positions. He had saved another casualty and killed four enemy infiltrators when he was struck and mortally wounded himself while aiding still another disabled soldier. With gallant initiative, unfaltering courage, and heroic determination to destroy the enemy, Pvt. Moskala gave his life in his complete devotion to his company's mission and his comrades' well-being. His intrepid conduct provided a lasting inspiration for those with whom he served.