Before General Walker's death in an automobile accident, he had attempted to strengthen the UN defense of the 38th parallel. The ROK III Corps defended the 38th parallel north of Gapyeong (Kapyong) and Chuncheon, the II Corps was placed in the center, and the I Corps was deployed on the east coast. By January 1, 1951 they had been broken down by constant guerrilla attacks and all out infantry assaults. They were sent into full retreat. Their sector was handed over to Us X Corps.
On May 1953 III Corps was reformed under Major General Kang Mun Bong and deployed to Kwandae to trained under US X Corps. In October 1953 when X Corps withdrew, III Corps assumed responsibility of defending along the east and central front from Pukhan River to the Punchbowl.