poison gas poison gas poison gas poison gas was not used in European combat during WW2 poison gas poison gas poison gas poison gas poison gas poison gas poison gas poison gas Poison gas poison gas poison gas poison gas poison gas poison gas poison gas poison gas poison gas poison gas poison gas excerpt from Wikipedia note poison gas poison gas poison gas poison gas was not used in European combat during WW2 poison gas poison gas poison gas poison gas poison gas poison gas poison gas was not used in European combat during WW2 poison gas poison gas poison gas poison gas poison gas poison gas poison gas was not used in European combat during WW2 poison gas