The disastrous mobilisation of the National Defense Corps was a highly visible incident that could not be suppressed by the Rhee regime, and it soon caught the attention of the
political opposition in South Korea. Numerous witnesses, and rumours quickly spreading across the country, made a cover-up nearly impossible.
Lee Cheol-seung reported the incident to the
National Assembly of South Korea in early January 1951 after receiving reports of corruption within the National Defense Corps. Lee met with a personal friend who had been conscripted to gather information on the issue, only to find him suffering from severe malnutrition. On 15 January 1951, the National Assembly launched a fact-finding mission into the National Defense Corps incident, as evidence quickly mounted. Kim Yun-geun and Shin Seong-mo attempted to smear supporters of the mission as "subversive elements" and a "
fifth column" but to no effect. Rhee himself was scrutinised for his appointments in the National Defense Corps, and faced pressure from his own officials to punish those responsible. Minister of Home Affairs
Chough Pyung-ok personally confronted Rhee at
Gyeongmudae with photographs of the
corpses of dead conscripts. Mayor of Seoul
Yun Bo-seon, one of Rhee's closest aides, visited Gyeongmudae and demanded that he punish Shin, Kim Yun-geun, and other National Defense Corp officials. Rhee told Yun the incident was a
communist plot, but Yun dismissed the claim and requested evidence, leading to a break between the two. Rhee was reluctant to punish those responsible, Shin in particular, despite mounting pressure. He decided to try Kim Yun-geun and Yun Ik-heon in a
military court due to public anger, but when Kim was
acquitted and Yun was sentenced to only three years and six months in prison, it just inflamed public anger even more. Commanders of the
United States Forces Korea were enraged and confronted Rhee on the issue, threatening to withdraw U.S. forces from South Korea unless Shin was dismissed and those responsible were punished. Rhee continued to refuse to dismiss Shin even after the
Geochang massacre in early February, and Shin's attempts to defend the massacre in the National Assembly were met with widespread criticism. On 30 April 1951, the National Assembly adopted a resolution on disbandment of the National Defense Corps. On 12 August 1951, Kim Yun-geun, Yun Ik-heon, Kang Seok-han, Park Chang-eon, and Park Gi-hwan were publicly executed as persons in charge of the National Defense Corps incident.
Number of deaths and casualties By June 1951, when an investigating committee made known its findings, it was reported that some 50,000 to 90,000 soldiers starved to death or died of disease on the march and in the training camps. According to a 2021 article in
Foreign Policy by S. Nathan Park, 120,000 soldiers died from frostbite and malnutrition. ==See also==