Lots of countries had widespread Chemical weapons usage. Iraq used chemical weapons in the Iran-Iraq war: https://en.wikipedia.org/wiki/Iraqi_chemical_weapons_

Lots of countries had widespread Chemical weapons usage. Iraq used chemical weapons in the Iran-Iraq war: https://en.wikipedia.org/wiki/Iraqi_chemical_weapons_program https://en.wikipedia.org/wiki/Iraqi_chemical_weapons_program Israel used white phosphorous till 2013: http://www.bbc.com/news/world-middle-east-22310544 http://www.bbc.com/news/world-middle-east-22310544 the Soviet Union was accused of using chemical weapons in afghanistan: http://www.paulbogdanor.com/left/afghan/report.pdf http://www.paulbogdanor.com/left/afghan/report.pdf The UN stated that Cuban units used VX as well as Sarin: https://en.wikipedia.org/wiki/Chemical_warfare#Angola https://en.wikipedia.org/wiki/Chemical_warfare#Angola even the vietnamese used chemical weapons: https://en.wikipedia.org/wiki/Vietnamese_border_raids_in_Thailand#1985 https://en.wikipedia.org/wiki/Vietnamese_border_raids_in_Tha... None of these examples include the use of chemical weapons in WWII or WWI. During these wars most major european countries used chemical weapons of some kind. these instances don't excuse their usage, But I don't believe much is gained by pretending the rest of the world is blameless.