chemical warfare (redirected from Chemical weapon agent)

chemical warfare, employment in war of incendiaries, poison gases, and other chemical substances. Ancient armies attacking or defending fortified cities threw burning oil and fireballs. A primitive type of flamethrower was employed as early as the 5th cent. B.C.; modern types are still in use. In the Middle Ages, before the introduction of gunpowder, a flammable composition known as Greek fire was used. Smoke from burning straw or other material was employed in early times, but its effectiveness is uncertain.

Poison gas was first used during World War I, when the Germans released (Apr., 1915) chlorine gas against the Allies. The Germans also introduced mustard gas later in the war. Afterward, the major powers continued to stockpile gases for possible future use and several actually used it: the British in Afghanistan, the French and Spanish in Africa, the Italians in Ethiopia, and the Japanese in China. Lethal gases were not employed in combat during World War II, but the Germans did use gases for mass murder during the Holocaust. The Germans also invented and stockpiled the first nerve gas. It is odorless and colorless and attacks the body muscles, including the involuntary muscles. It is the most lethal and insidious weapon of chemical warfare. Since World War II, chemical weapons are known to have been used by Egypt in Yemen (during the 1962–67 civil war) and by Iraq against Iran during the Iran-Traq War and against Kurdish rebels.

Besides lethal gases, which attack the skin, blood, nervous, or respiratory system and require hospitalization of the victim, there are also nonlethal incapacitating agents, which, like tear gas, cause temporary physical disability. Such agents have often been employed in riot control, espionage, and warfare. Various forms of herbicides and defoliants are also used to destroy crops or vegetation, as Agent Orange was used by the United States during the Vietnam War.

The potential effectiveness of chemical warfare is increasing with improved methods of dissemination, such as artillery shells, grenades, missiles, and aircraft and submarine spray guns. Some protection against chemical weapons is possible using suits, sealed vehicles, and shelters. Such countermeasures usually protect against nuclear fallout and biological warfare as well. Lethal chemical weapons are held by many nations and they continue to be used. The danger of the proliferation of chemical and biological weapons remains despite arms control because they are relatively easy to manufacture and deploy.

Efforts to control chemical and biological weapons began in the late 19th cent. The Geneva Protocol of 1925, which went into force in 1928, condemned the use of chemical weapons but did not ban the development and stockpiling of chemical weapons. The United States did not ratify the protocol until 1974. In 1990, with the end of the cold war, the United States and the Soviet Union agreed to cut their arsenals by 80% in an effort to create a climate of change that would discourage smaller nations from stockpiling and using such lethal weapons. In 1993 a international treaty banning the production, stockpiling (both by 2007), and use of chemical weapons and calling for the establishment of an independent organization to verify compliance was adopted. The agreement, which became effective in 1997, has been signed and ratified by 160 nations. The treaty is enforced by the Organization for the Prohibition of Chemical Weapons, which is based in The Hague. The alleged Iraqi retention, after the Persian Gulf War cease-fire, of chemical weapons and other weapons of mass destruction was the main pretext for the 2003 U.S.-British invasion of Iraq.

Bibliography

See the ongoing Stockholm International Peace Research Institute (SIPRI), The Problems of Chemical and Biological Warfare (1971–); R. Harris and J. Paxman, A Higher Form of Killing (1982); E. M. Spiers, Chemical Warfare (1986); J. B. Tucker, War of Nerves (2006).

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chemical warfare

Use of lethal or incapacitating chemical weapons in war, and the methods of combating such agents. Chemical weapons include choking agents such as the chlorine and phosgene gas employed first by the Germans and later by the Allies in World War I; blood agents such as hydrogen cyanide or cyanogen gas, which block red blood cells from taking up oxygen; blister agents such as sulfur gas and Lewisite, also dispensed as a gas, which burn and blister the skin; and nerve agents such as Tabun, Sarin, Soman, and VX, which block the transmission of nerve impulses to the muscles, heart, and diaphragm. The horrific casualties suffered in World War I led to the 1925 Geneva Protocol, which made it illegal to employ chemical weapons but did not ban their production. Chemical weapons were used a number of times afterward, most notably by Italy in Ethiopia (1935–36), by Japan in China (1938–42), by Egypt in Yemen (1966–67), and by Iran and Iraq against each other (1984–88). During the Cold War the Soviet Union and U.S. built up enormous chemical arsenals; these were dismantled under the terms of the 1993 Chemical Weapons Convention, which prohibits all development, production, acquisition, stockpiling, or transfer of such weapons. Not all countries have signed the convention, and many are suspected of pursuing clandestine chemical programs. Many military forces have adopted various defensive measures, including chemical sensors, protective garments and gas masks, decontaminants, and injectable antidotes, and some have reserved the option of retaliating in kind to any chemical attack. In 1995 a religious cult killed 12 civilians and injured thousands more with Sarin gas in Tokyo; this pointed out the power of chemical agents as weapons of terror as well as the difficulty of protecting civilian populations. See also biological warfare.

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chemical warfare [′kem·i·kəl ′wȯr‚fer]

(ordnance)

Originally, the employment of poison gases as antipersonnel agents; later expanded to include flame and incendiary warfare, smoke for screening or signaling purposes, and microorganisms (bacteria and their toxins, rickettsia, viruses) for the production of casualties or destruction of crops. Also known as chemical operations.