Early uses The use of chemicals to induce altered states of mind in an adversary dates back to antiquity and includes the use of plants of the
nightshade family (Solanaceae), such as the
thornapple (Datura stramonium), that contain various combinations of
anticholinergic alkaloids. The use of nonlethal chemicals to render an enemy force incapable of fighting dates back to at least 600 B.C. when Solon's soldiers threw
hellebore roots into streams supplying water to enemy troops, who then developed diarrhea. In 184 B.C.,
Hannibal's army used
belladonna plants to induce disorientation, and the
Bishop of Münster in A.D. 1672 attempted to use belladonna-containing grenades in an assault on the city of
Groningen. In 1881, members of a French railway surveying expedition crossing
Tuareg territory in North Africa ate dried dates that tribesmen had apparently deliberately contaminated with Egyptian henbane (
Hyoscyamus muticus, or
H. falezlez), to devastating effect. In 1908, 200 French soldiers in
Hanoi became delirious and experienced hallucinations after
being poisoned with a related plant. More recently, accusations of
Soviet use of incapacitating agents internally and in
Afghanistan were never substantiated.
The 20th century Following
World War II, the United States military investigated a wide range of possible nonlethal, psychobehavioral, chemical incapacitating agents to include psychedelic
indoles such as
lysergic acid diethylamide (LSD-25) and the
tetrahydrocannabinol derivative
DMHP, certain tranquilizers, as well as several glycolate anticholinergics. One of the anticholinergic compounds,
3-quinuclidinyl benzilate, was assigned the NATO code "BZ" and was weaponized beginning in the 1960s for possible battlefield use. (Although BZ figured prominently in the plot of the 1990 movie, ''
Jacob's Ladder'', as the compound responsible for hallucinations and violent deaths in a fictitious American battalion in
Vietnam, this agent never saw operational use.) Destruction of American stockpiles of BZ began in 1988 and is now complete.
US survey and testing programs By 1958 a search of the tropics for venomous animal species in order to isolate and synthesize their
toxins was prioritized. For example,
snake venoms were studied and
The College of Medical Evangelists was under contract to isolate
puffer fish poison. The
New England Institute for Medical Research and Fort Detrick were studying the properties and biological activity of the
Botulinum toxin molecule. The
U.S. Army Chemical Warfare Laboratories were isolating shellfish toxin and trying to obtain its structure. A Central Intelligence Agency
Project Artichoke document reads: "Not all viruses have to be lethal ... the objective includes those that act as short-term and long-term incapacitants." The concept of "humane warfare" with widespread use of incapacitating or deliriant drugs such as
LSD or
Agent BZ to stun an enemy, capture them alive, or separate friend from foe had been available in locations such as
Berlin since the 1950s, an initial focus of US CBW development was the offensive use of diseases, drugs, and substances that could completely incapacitate an enemy for several days with some lesser possibility of death using a variety of chemical, biological, radiological, or toxin agents. The US Army
Assistant Chief of Staff for Intelligence (ACSI) authorized operational field testing of LSD in interrogations in the early 1960s. The first field tests were conducted in Europe by an Army Special Purpose Team (SPT) during May to August 1961 in tests known as
Project THIRD CHANCE. The second series of field tests,
Project DERBY HAT, were conducted by an Army Special Purpose Team in the Far East during August to November 1962. A study of possible uses of migratory birds in germ warfare was funded through Camp Detrick for years using the Smithsonian as a cover. Government documents have linked the Smithsonian to the CIA's mind control program known as
MKULTRA. The CIA were interested in bird migration patterns for CBW research under MKULTRA where, a Subproject 139 designated "Bird Disease Studies" at
Pennsylvania State University. An agents purchase of a copy of the book
Birds of Britain, Europe, is recorded as part of what was described in a financial accounting of the MKULTRA program as a continuous project on bird survey in special areas. Sampling of native migratory organisms with a focus on birds provided to researchers the natural habitat of disease causing fungus, viruses, and bacteria as well as the established (or potential) vectors for them. The sampling also provided exotic tropical viruses and toxins from the various organisms collected on both land and sea. The studies, including the
Pacific Ocean Biological Survey Program (POBSP) were conducted by the
Smithsonian Institution and
Project SHAD crews on Pacific islands and atolls. The "bird cruises" were subsequently found to be a U.S. Army cover for the prelude to chemical, biological, and entomological warfare experiments related to
Deseret Test Center,
Project 112, and
Project SHAD. A U.S. War Departments report notes that "in addition to the results of human experimentation much data is available from the Japanese experiments on animals and food crops." German researchers have found that records of the Entomology Institute at the
Dachau concentration camp show that under orders of
Schutzstaffel (SS) leader
Heinrich Himmler, the Nazis began studying mosquitoes as an offensive biological warfare vector against humans in 1942. It was generally thought by historians that the Nazis only intended ever to use biological weapons defensively. Project 112 included objectives such as “the feasibility of an offshore release of
Aedes aegypti mosquitoes as a vector for infectious diseases,” and “the feasibility of a biological attack against an island complex.” "The feasibility of area coverage with adedes aegypti mosquitoes was based on the Avon Park, Florida mosquito trials." Several CIA documents, and a 1975 Congressional committee, revealed that several locations in Florida, as well as Avon Park, hosted experiments with mosquito-borne viruses and other biological substances. Formerly top-secret documents related to the CIA's
Project MKNAOMI prove that the mosquitoes used in Avon Park were the Aedes aegypti type. "A 1978 Pentagon publication, entitled
Biological Warfare: Secret Testing & Volunteers, reveals that the Army's
Chemical Corps and Special Operations and Projects Divisions at Fort Detrick conducted 'tests' similar to the Avon Park experiments but the bulk of the documentation concerning this highly classified and covert work is still held secret by the Pentagon." ==Sleeping gas==