It is said that the defoliant sprayed in south Korea, in particular, is more poisonous than what the U.S. used during the Vietnam war of aggression.

This was disclosed in a report worked out by the U.S. Department of Defense.

This record is contained in other report of the U.S. government.

The discovery of even the document in which the Command of the U.S. forces in south Korea asked the U.S. military advisory group to issue a detailed order over the procedures to spray defoliant brought to light that it was deeply involved in the operation for spraying defoliant.