Is it war crime to drop drugs onto enemy's positions during warfare?
I think, this is not considered chemical warfare.
Of course, one can try to drop poition diguised as drugs, but this will be ineffective because the rumors will quickly spread and this will not work second time. But what about dropping the actual recreational drugs, like opiates?
P.S. I was not asking about use of poitionous gases, I was asking about dropping drug pills, syringes, ampules with those drugs, so that the enemy soldiers to get voluntarily intoxicated.