Respuesta :

Titan041
World War 1 where the first use of chlorine gas. A deadly toxin used by the germans as chemical warfare
Mitsu12

Question: What happened on April 22, 1915?

Answer: Germans introduce poison gas.

Supporting Answer:  On April 22, 1915, German forces shock Allied soldiers along the western front by firing more than 150 tons of lethal chlorine gas against two French colonial divisions at Ypres, Belgium.

Extra Comment: Umm, how long have you been waiting since 2018? Haha, but still, heres the answer.