The argument I've seen against their usefulness is that they only work against static militaries that don't have NBC training, and a modern military can already

The argument I've seen against their usefulness is that they only work against static militaries that don't have NBC training, and a modern military can already defeat threats like that without paying the political cost of using them. https://acoup.blog/2020/03/20/collections-why-dont-we-use-chemical-weapons-anymore/ https://acoup.blog/2020/03/20/collections-why-dont-we-use-ch...