CHEMICAL WARFARE AGENTS (CWAS), MAINLY MUSTARD GAS, WERE USED ON A LARGE SCALE IN THE WORLD WAR I. IN ADDITION TO MUSTARD GAS, NEUROTOXIC AGENTS, WHICH ARE ALSO KNOWN AS NERVE AGENTS, SUCH AS SARIN AND TABUN WERE EMPLOYED FOR THE FIRST TIME IN THE IRAN–IRAQ WAR THEN WERE USED IN SOME TERRORIST ATTACKS IN JAPAN [1]. ...