Chemical weapons in World War I were primarily used to demoralize, injure and kill entrenched defenders, against whom the indiscriminate and generally...

Chemical warfare (CW) involves using the toxic properties of chemical substances as weapons. This type of warfare is distinct from Nuclear warfare and...

Considered uncivilised prior to World War One, the development and use of poison gas was necessitated by the requirement of wartime armies to find new...

Poison Gases. v Primary Sources v. Poisonous gases were known about for a long time before the First World War but military officers were reluctant to...

poison gas any of various gases sometimes used in warfare or riot control because of their poisonous or corrosive nature. These gases may be...

poison gas n. A gas or vapor used especially in chemical warfare to injure, disable, or kill upon inhalation or contact.

Poison gas was probably the most feared of all weapons in World War One. Poison gas was indiscriminate and could be used on the trenches even when no ...

noun any of various toxic gases, especially those used in chemical warfare to kill or incapacitate on inhalation or contact, as phosgene, chlorine, et...