During the lead-up to the Iraq War, the United States had alleged that Iraq owned bioreactors, and other processing equipment to manufacture and process biological weapons that can be moved from location to location either by train or vehicle. Subsequent investigations failed to find any evidence of Iraq having access to a mobile weapons lab.

Iraq actively researched and later employed weapons of mass destruction (WMD) from 1962 to 1991, when it destroyed its chemical weapons stockpile and halted its biological and nuclear weapon programs as required by the United Nations Security Council. The fifth president of Iraq, Saddam Hussein, was internationally condemned for his use of chemical weapons against Iranian and Kurdish civilians during the Iran–Iraq War in the 1980s. Saddam pursued an extensive biological weapons program and a nuclear weapons program, though no nuclear bomb was built. After the Gulf War, the United Nations located and destroyed large quantities of Iraqi chemical weapons and related equipment and materials; Iraq ceased its chemical, biological and nuclear programs.