>> They are not used because somehow all countries pretty much agreed they’re way TOO effective and horrific
That’s the story but it doesn’t hold up. Chemical weapons were used as recently as the Syrian civil war. I also think if they were really effective in modern warfare, Russia would have long ago deployed them in Ukraine.
More here: https://acoup.blog/2020/03/20/collections-why-dont-we-use-ch...
What do you mean “if they were really effective”? We still hand out CBRN gear and train in how to put necessary parts on in seconds, because that’s often how little time you get before you’re permanently incapacitated. Mustard gas alone should prove this, and that’s an OLD chemical weapon.
Nowadays we have riot control agents that can be tailored to demographics, react more violently in the presence of sweat, or contain psychoactive ingredients. Nanoparticle dispersion bypasses common gas masks and clothing protection. Even if you’re completely geared up, they can be engineered to last on surfaces for a long time, or react only in the presence of certain triggers. Imagine thinking you’re safe until someone turns on a certain light bulb and you cook inside your protective gear because you were actually exposed 12 hours earlier in an undetectable manner.
I'd encourage you to read the article. Chemical weapons are effectively useless against a well-trained "modern system" army. Part of that is the chemical warfare equipment and vehicles, but mostly it's cover-and-concealment. If you can actually find the enemy, it's much faster and simpler to use the other vastly destructive munitions that modern militaries have.