Walker, who had served with Landrum at Fifth Army, relied on him during organization of the Pusan Perimeter as Eighth Army organized the defensive action which enabled U.S. and South Korean forces to begin the counterattack that pushed the North Koreans north across the 38th Parallel. Walker, who always referred to Landrum as "General Landrum" in recognition of his temporary World War II rank, made Landrum responsible for finding replacement troops and reinforcements and employing them where they could be most effective. Landrum received a second award of the Distinguished Service Medal to recognize his efforts in Korea.