What is positive about chemical warfare?

I am doing an essay for my U.S. history class about the America's involvment with Biological and Chemical weapons, so I was wondering what war did America use the most Biological and Chemical weapons and what were they?

http://swampland.time.com/2012/12/06/gas-mask -why-is-chemical-warfare-obamas-red-line-in-s yria/?xid=newsletter-daily

http://www.irishexaminer.com/world/us-believes-syria-used-chemical-weapons-229540.html

So I am writing a research people for my English II class, everyone chose simple subjects such as Gender inequality or Abortion but I wanted to choose a more...interesting, unknown topic to study. So if you can answer these questions and tell me your...

1) What is your earliest memory dealing with warfare? Was this experience positive or negative? 2) How did warfare develop throughout your lifetime? What kind of debate or controversy existed over these developments? 3) Do you feel warfare has been largely...

The Biological Warfare Convention and Chemical Warfare Convention, are treaties about biological and chemical warfare. I was wondering if any countries have violated either of ...show more

What is the difference between Guerrilla Warfare and Conventional Warfare and are American troops able to handle Guerrilla Warfare when fighting the Taliban ( Are they successful in ...show more

Dawkins mentioned that Ants and mankind are the main species that engage in take no prisoners group warfare within their own species.  What are the conditions that lead to this group behavior?  For instance, does the existence of language and the ability...