when was chlorine gas first used in ww1
before 2 January 1915
-1
Section::::History of poison gas in World War I.:1915: Large-scale use and lethal gases.

Chemical weapons in World War I
167578
14594280223076770230
NONE
Section::::History of poison gas in World War I.:1915: Large-scale use and lethal gases.

Chemical weapons in World War I
167578