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en.wikipedia.org/wiki/Chemical_weapons_in_World_War_I

Although the use of toxic chemicals as weapons dates back thousands of years, the first large ... History of poison gas in World War I[edit]. See also: Weapons of ...

www.historylearningsite.co.uk/world-war-one/the-western-front-in-world-war-one/poison-gas-and-world-war-one

Poison gas was probably the most feared of all weapons in World War One. Poison gas was indiscriminate and could be used on the trenches even when no  ...

www.firstworldwar.com/weaponry/gas.htm

British gas mask variant Considered uncivilised prior to World War One, the development and use of poison gas was necessitated by the requirement of wartime ...

www.bbc.com/news/magazine-31042472

Jan 30, 2015 ... Gas terrified soldiers in WW1, but it killed comparatively few of them, at least on the Western Front. So why was it the one WW1 weapon to be ...

www.history.com/this-day-in-history/germans-introduce-poison-gas

At the outbreak of World War I, the Germans began actively to develop chemical weapons. In October 1914, the Germans placed some small tear-gas canisters ...

chemicalweapons.cenmag.org/when-chemicals-became-weapons-of-war

Feb 27, 2015 ... The release of poison gas 100 years ago changed the face of World War I and gave humanity a new weapon of mass destruction. Nobody ...

.ask.com/youtube?q=Poison+Gas+in+WWI&v=OrHFEPu_ANI
Apr 7, 2015 ... All soldiers feared poison gas but all sides developed deadlier and more perfidious kinds of chemical agents. Indy tells you everything about ...

www.world-war-1-facts.com/World-War-One-Weapon-Facts/World-War-One-Poison-Gas-Facts.html

World War One poison gas - a list of facts about one of WW1's most horrible weapons.

wwi.lib.byu.edu/index.php/The_Use_of_Poison_Gas

Jun 30, 2009 ... From the New York Tribune, April 25, 26, 27, 1915. The German Army dispersed chlorine gas over Allied lines at Ypres on 22 April 1915.

www.compoundchem.com/2014/05/17/chemical-warfare-ww1

May 17, 2014 ... I'll be accompanying some of the students from my school on a history trip to Ypres and a few other World War 1 battlefields in a few weeks' ...