Then all hell broke lose. People were coughing and struggling to breathe. What was this and where did it come from. This was the first case of Biochemical warfare. Biochemical warfare has come a long way since 1915.
Today there are a lot more powerful angence out there.
Well it is the deployment of a toxic substance that is designed to kill plants, animal, or even human beings. It was first used during World War One. Both sides used these evil weapons and both sides inflicted a lot of pain. There were heavy casualties on both sides. Unfortunately these weapons have became stronger.