During the course of history, Chemical Warfare has been used by nations to obtain a strategic advantage over their enemies.  Chemical agents are designed to maim, kill, seriously injure, or incapacitate unprotected people.  These weapons have been used against military and civilian targets as well.  Due to the nature of these weapons, laws and treaties have been enacted to prevent the use of these weapons.  However, rouge countries continue to produce these weapons and the threat behind the use of chemical weapons is as real today as ever.  A brief history and types of chemical weapons that are used will be discussed.