Zyklon B
The most common method was with artillery.It is NOT a biological weapon, it is a chemical weapon.
The test was codenamed Trinity, the bomb was codenamed Gadget.
Tear Gas and Mustard Gas
I think it is chemical gas...
Thus far in history, I'd say the atom bombs of WW2.
This type of chemical weapon paralyse the body. It's poisoning the mind and body. Coma,disorientation and death can occur.
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Chemical weapons; poison gas usually delivered by artillery.
The tank and the automatic rifle and grenades and larger mortar fire are the most dangerous weapons. The most dangerous chemical weapon was the mustard gas the Germans used.
Several countries have utilized chemical weapons in warfare throughout history. Notably, during World War I, nations such as Germany, France, and the United Kingdom deployed various chemical agents like chlorine and mustard gas. In World War II, Japan used chemical weapons in China, while Iraq employed them against Iran during the Iran-Iraq War in the 1980s. More recently, there have been allegations of chemical weapon use in conflicts such as the Syrian Civil War.
chemical weapon convention