User blog comment:Octivian Marius/Entente vs Centeral/@comment-5169980-20131119202634/@comment-1789156-20131124140058

Use of tear gas in warfare (as all other chemical weapons) is prohibited by various international treaties, e.g. the Geneva Protocol of 1925: 'Prohibited the use of "asphyxiating gas, or any other kind of gas, liquids, substances or similar materials"'. Armed forces can only legally use tear gas for drills (practicing with gas masks) or for riot control.