On Sunday, #ICE used #chemicalweapons in #Portland OR, firing #teargas on a crowd of peaceful protesters.

This was legal only because the victims were civilians in peacetime. Chemical weapons are banned in war by both the 1925 Geneva Protocol and the1993 Chemical Weapons Convention (CWC).

#CWC Article II.clause 9 lists "Purposes Not Prohibited Under this Convention" to include "Law enforcement including domestic riot control purposes".

Gassing soldiers is banned. Gassing civilians is OK.