Both sides, but the Germans started it.
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.
Poison gas is brought into WWI by the Germans. Both sides used gas, although the Germans were the first to use poison gas
World War 1 was the first time Poison Gas was used on the battle field.
Germany
poison gas was used for the first time. APEX
Poison gas was used for the first time.
World War I
Poison gas was first used by the Germans at Second Battle of Ypres during the First World War.
both sides, though it was the Axis who used it first.
Poison gas was first used during this battle
poison gas was used for the first time. APEX