When the Germans used gas attacks, gas masks were crucial right away. Without them, soldiers would be vulnerable to poison gas. But soldiers wouldn't know when there was danger. That's because they couldn't detect the gas. But Stubby knew when there was gas and would alert the soldiers, helping protect them from the potentially lethal threat.
Soldiers were immediately required to wear gas masks.Soldiers would be poisoned if they did not have them. However, soldiers would be unaware of any risk. That's because they couldn't find the gas and would have to rely on the military.
The Germans used mustard gas in the summer of 1917.By targeting the skin and blinding its victims, it defied ordinary gas masks and respirators.