Chlorine, phosgene, acrolein . . . take your pick.
Upas (also called ipoh) is an arrow poison used by people of Indonesia and Malaysia.
The Germans used the deadly poison Mustard Gas in World War I. The British used something equivalent to this, but not exactly the same.
World War I
The Germans, and the French used poison gas and other gases likePoison Gastear GasViolent fit of sneezingBut Poison Gas was mainly used in WWII.
Chlorine
Yes. Mustard Gas
Zyklon-B
Germany
they thourgh ot
chlorine
tear gas
World War 1 was the first time Poison Gas was used on the battle field.