Why not weaponize pot? Like put tons of it into a war zone, set it afire and waft the smoke into the faces of every soldier so that they're too high to fight!
@jshm2 Then it should be legalized! my idea isn't to kill, but to incapacitate. Laws can be rewritten, you know! And for the record, I didn't come up with this idea in school, I got it out of a movie.
But US soldiers used it in Vietnam to enable themselves to fight, see https://wayofleaf.com/blog/marijuana-during-the-vietnam-war, https://www.history.com/news/drug-use-in-vietnam.
So I don't think it would help in the way you think.