WW2 showed that strategic deterrence with chemical and biological weapons doesn't work. Both sides feared gas particularly and therefore didn't use war gas on

WW2 showed that strategic deterrence with chemical and biological weapons doesn't work. Both sides feared gas particularly and therefore didn't use war gas on each other (civilians is another matter.) Germany had very potent nerve gasses and had reason to believe the allies did as well, and didn't dare use them. But the threat of these gasses wasn't strong enough to deter the rest of the war.