This file contains a letter from the Secretariat of the General Military Intelligence (GMID) to the General Command of Armed Forces, dated 14 April 1987, pertaining to Iranian use of chemical weapons on Iraqi troops during an attack on 9 April 1987 and 12 April 1987. Additionally includes information that Iran received special chemical materials for production of mustard and tabun gases from North Korea and manufactured some with the support of North Korean experts.