Up until 1994, the American Veterans Affairs department denied disability payments to veterans of the Korean War suffering late after-effects of frostbite on the grounds that they could not prove that they had suffered the frostbite during active service on the Choisin Reservoir, where temperatures in 1950 were around minus 36 degrees C.
18,000 American troops were stationed on the Choisin reservoir, and nearly all were known to have suffered frostbite.