The largest and most effective weapon used by the Iraqi regime to silence the Kurds and eliminate them was chemical weapons, which are prohibited under the Geneva Convention of 1925. Although Iraq signed this treaty in 1931 and announced its conditional commitment, the Iraqi government has consistently disregarded the decisions of the international community in this matter (chemical attack) and ignored them, as well as disregarded international principles and foundations and did not hesitate to commit crimes against the Kurdish nation without regard for the global community and humanity. Even senior officials of this regime, in their discussions and statements, have not denied the use of these weapons but have legitimized the use of larger and more destructive weapons.

The use of chemical weapons by the Iraqi Ba'ath regime dates back to the beginning of the war between Iraq and Iran in 1983, 1987, and 1988 against civilians in towns and villages in Iraqi Kurdistan, as well as in Iranian cities.

Chemical Attack in  Halabja, Malakan, Yakhsamar, Sheikh Wasan, and the Balisan Valley, Jafayati Valley, Sharbazher, Sarkol, Karadak, Sekanyan, Goptapa, Askar, Wrte, Badinan, and many other areas.

In Iran, chemical weapons were also used in Kurdish cities such as Sardasht, Marivan, Bokan, and Kermanshah. 

The Ba'athist regime of Iraq committed extensive crimes by using 6,000 chemical bombs in 285 bombing raids, of which only a tiny portion of these crimes has been published.