| Encyclopedia: Chemical warfare (10378 words) |
 | A blood agent (also called a cyanogen agent) is a compound that prevents the normal transfer of oxygen from the blood to the body tissues, resulting in chemical asphyxiation. |
 | One of the earliest reactions to the use of chemical agents was from Rome. |
 | There are many reports of the isolated use of chemical agents in individual battles or sieges, but there was no true tradition of their use outside of incendiaries and smoke. |