The Korean war, the first major international conflict after the Second World War, was marked by the threat of a potential use of nuclear weapons. During the conflict the ICRC was unable to carry out activities on behalf of prisoners of war in Communist hands, despite repeated requests to be granted access to them.
The Korean War was the first major international conflict to erupt after the signing of the Geneva Conventions of 1949. However, the main belligerents having not yet acceded to the Conventions, these did not formally apply.