This gas was first used by the French. They used it against the German in the first month of the war. The only way to protect your selves from the gas is cotton masks. This could kill people fro many miles. It would burn people from the outside in.
This was one of the weapons used by the British in the trenches. A rifle could shoot a person from 1,400 meters away. This weapon was one that was used the most in war.
This weapon was first introduced to the war by the Germans. The were used in many wars after that. There is no way of really protecting your self from grenades. Grenades is just another name for bomb.