The guy who invented/ developped Yperite was a German jew Fritz Haber who worked for the army and always tried to prove he was a good German . He is also the guy who invented the infamous CyclonB without knowing what it will be used for .
When Hitler took power in 1933, he was recovering of illness in France . He will come back directly to Germany to offer his servce, when all the others ran away . German accepted, even if he was a jew, as a war veteran, but was ordered to fire all non aryen of his lab .
He refused and died in Bâle in 1934
Nobel prize of chemistry in 1918 !!!!!!!!!!!!!!!!!!!!!!!!