Quote from stoic:
On 16 March 1988, the Kurdish town of Halabja was attacked with a mix of mustard gas and nerve agents, killing 5,000 civilians, and maiming, disfiguring, or seriously debilitating 10,000 more. The attack occurred in conjunction with the 1988 al-Anfal campaign designed to reassert central control of the mostly Kurdish population of areas of northern Iraq and defeat the Kurdish peshmerga rebel forces. It is estimated that 1.1 to 2.1 million deaths resulted from the al-Anfal campaign. Saddam ordered the attack to terrorize the Kurdish population in northern Iraq. The bloody eight-year war ended in a stalemate.
During the Iraq- Iran war, Iraq used chemical weapons against Iranian forces fighting on the southern front.
A weapon of mass destruction (WMD) is a weapon that can kill and bring significant harm to a large number of humans (and other life forms) and/or cause great damage to man-made structures (e.g. buildings), natural structures (e.g. mountains), or the biosphere in general. The scope and application of the term has evolved and been disputed, often signifying more politically than technically. Coined in reference to aerial bombing with chemical explosives, it has come to distinguish large-scale weaponry of other technologies, such as chemical, biological, radiological, or nuclear. This differentiates the term from more technical ones such as chemical, biological, radiological, and nuclear weapons (CBRN).