When was the Chemical Weapons Convention adopted and when did it enter into force?

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American soldiers in World War I uniforms, some wearing gas masks, advance with rifles during a simulated gas attack exercise on a rocky battlefield. — chemical weapon American soldiers participating in a simulated gas attack exercise, World War I.

The Chemical Weapons Convention (CWC) was adopted by the United Nations Conference on Disarmament on September 3, 1992. Following its adoption, the treaty was opened for signature on January 13, 1993, and it officially entered into force on April 29, 1997.1