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  1. chemical weapon, any of several chemical compounds, usually toxic agents, that are intended to kill, injure, or incapacitate enemy personnel.In modern warfare, chemical weapons were first used in World War I (1914–18), during which gas warfare inflicted more than one million of the casualties suffered by combatants in that conflict and killed an estimated 90,000.

    • Barry R. Schneider
  2. The British stockpiled chemical weapons to use in case of a German invasion. Pictured is a chemical warfare bulk decontamination vehicle. The Western Allies did not use chemical weapons during the Second World War.

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  4. The post-war era has seen limited, though devastating, use of chemical weapons. Some 100,000 Iranian troops were casualties of Iraqi chemical weapons during the Iran–Iraq War. Iraq used mustard gas and nerve agents against its own civilians in the 1988 Halabja chemical attack.

  5. May 12, 2015 · April 22. The German military launches the first large-scale use of chemical weapons in war at Ypres, Belgium. Nearly 170 metric tons of chlorine gas in 5,730 cylinders are buried along a four-mile stretch of the front. In the end more than 1,100 people are killed by the attack and 7,000 are injured. September 25.

  6. The types of weapons employed ranged from disabling chemicals, such as tear gas, to lethal agents like phosgene, chlorine, and mustard gas. These chemical weapons caused medical problems. [3] This chemical warfare was a major component of the first global war and first total war of the 20th century.

  7. Apr 6, 2017 · The scope of WWI's chemical weaponry was unlike anything seen on the battlefield before. Over the course of the war — which lasted from July 28, 1914, to Nov. 11, 1918 — about 3,000 chemicals ...

  8. Apr 12, 2022 · Chemical weapons production, use and stockpiling is banned under the 1997 Chemical Weapons Convention (CWC). Only Egypt, North Korea and South Sudan have not signed or ratified the international ...

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