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France used tear gas in 1914, but the first large-scale successful deployment of chemical weapons was by the German Empire in Ypres, Belgium in 1915, when chlorine gas was released as part of a German attack at the Battle of Gravenstafel.
Tear gas in use in France 2007 Exploded tear gas canister in the air in Greece. Tear gas, also known as a lachrymatory agent or lachrymator (from Latin lacrima 'tear'), sometimes colloquially known as "mace" after the early commercial self-defense spray, is a chemical weapon that stimulates the nerves of the lacrimal gland in the eye to produce tears.
The compound 2-chlorobenzalmalononitrile (also called o-chlorobenzylidene malononitrile; chemical formula: C 10 H 5 ClN 2), a cyanocarbon, is the defining component of the lachrymatory agent commonly referred to as CS gas, a tear gas which is used as a riot control agent, and is banned for use in warfare due to the 1925 Geneva Protocol.
Tear gas, pepper spray and impact munitions have been deployed by police for months against protesters in Portland, Oregon, enveloping neighborhoods and even a school yard in clouds of stinging ...
Portland Mayor Ted Wheeler (D) announced Thursday that he had directed the Oregon city's police department to end its use of tear gas, marking a potential turning point in the ongoing protests ...
The 1993 Chemical Weapons Convention banned the use of tear gas in warfare, but it does not stop countries from using it to quell domestic uprisings. ... Law enforcement agencies use strategies ...
CS tear gas was used at the G8 protests in Genoa, Italy [76] and Quebec City, Canada [77] during the FTAA anti-globalization demonstrations during the Quebec City Summit of the Americas. The Malaysia Federal Reserve Unit has also been known to use CS tear gas against its citizens who rallied for clean and fair elections under what were called ...
Law enforcement officials shy away from describing crowd-dispersing chemical tools as tear gas; it evokes police gassing citizens or the horrors of war. But giving those tools a more antiseptic ...