Introduction.—a. Munitions other than chemical, such as high explosives and bullets, are effective solely because of their ability to destroy materiel and personnel. Chemical agents perform their missions by direct chemical action. b. Chemical agents differ from other types of munitions in the varying lengths of time during which they are effective. The effective period of high explosives and bullets ends when the fragments come to rest, but the effective period of chemicals may continue for hours or days. c. The cover sought for protection against the fire of bullets and high explosives, such as defilade and trenches, affords only very limited protection against chemical attack. The chemical agent permeates the atmosphere and reaches men behind concrete parapets and buildings, in trenches, or wherever else they may be. d.
DesignationFM 3-5
EditionJan 1942
StatusSuperseded
Pages158
FunctionCBRN
CollectionHistoric
Public domain (U.S. Government work)