both sides, though it was the Axis who used it first.
World War I
No. Poison gas was first used in World War 1.
In the beginning of the war, only the Axis used poison gas (mustard gas was the first kind to be used), but by the end of the war, both sides used poison gas as a weapon.
Yes. Mustard Gas
tear gas
A gas called "Mustard Gas"" was used.
The Germans used the deadly poison Mustard Gas in World War I. The British used something equivalent to this, but not exactly the same.
They had them in case poison gas was used in the war. Fortunately it wasn't.
Chlorine
Zyklon-B
Germany
chlorine