The only reason the US or any other country gave up chemical weapons is because they are nearly useless anyways.
There are plenty of other weapons (such as mines) that the “international community” has “banned”, but are very useful in a war. Any country that doesn’t or can’t expect the US to come to its rescue ignores such bans and still manufactures them in great quantities.
There are plenty of other weapons (such as mines) that the “international community” has “banned”, but are very useful in a war. Any country that doesn’t or can’t expect the US to come to its rescue ignores such bans and still manufactures them in great quantities.