Chemical weapon - Defense, Protection, Prevention: Since World War I the military organizations of all the great powers have acquired defensive equipment to cope with emerging offensive …

chemical weapon, any of several chemical compounds, usually toxic agents, that are intended to kill, injure, or incapacitate enemy personnel. In modern warfare, chemical weapons were first …

Chemical weapon - Nerve Agents, Toxins, Warfare: The most lethal and important chemical weapons contain nerve agents, which affect the transmission of impulses through the nervous …

Modern chemical weapons were first used in 1915, when the Germans directed chlorine gas at their enemies in World War I. Initial attacks created thousands of casualties, and both sides …

Learn about the development of chemical warfare during World War I.

German soldiers operate a machine gun while they wear gas masks. Soldiers in World War I had to wear gas masks as protection from chemical weapons.

World War I saw the debut of the tank and chemical weapons, the widespread use of machine guns and aircraft, improvements in artillery, and the pinnacle of the age of battleships.

But Haber was willing to pervert this chemical genius to help Germany win the war. And he set out to craft deadlier chemical weapons, leading a group of scientists the German military …

Geneva Protocol, (1924) League of Nations draft treaty to ensure collective security in Europe. Submitted by Edvard Beneš, the protocol proposed sanctions against an aggressor nation and …

The Second Battle of Ypres begins. The German army initiates the modern era of chemical warfare by launching a chlorine attack on Allied trenches. Some 5,000 French and Algerian …