Zyklon B
Apparently, some states do still use the gas chamber. The the related link.
Poison gas is brought into WWI by the Germans. Both sides used gas, although the Germans were the first to use poison gas
Gas, bio logical warfare
battle of the ypres
The Germans on the Western Front
It was a non-messy and very discreet way of mass killings
the Germans :)
Because it disabled the enemy and pre-occupied their medics.
guns, tanks
CS gas or tear gas, not to be confused with CN also called Mace.
In World War 1, we begin to see the first use of poision gas use. The Germans used chlorine and mustard gas to clear trenches of the Allied forces.
regular car gas