The Islamic State of Iraq and Syria has allegedly launched a chemical weapons attack on a base used by American military forces to support Iraqi efforts to retake the city of Mosul. The Sept. 21 artillery attack on Qayyara Air Base that reportedly contained a chemical shell caused no casualties, but some American troops underwent decontamination procedures as a precaution.
The attack, which Pentagon chief Gen. Joseph Dunford said is suspected to have used mustard gas, is the first time American troops have faced hostile chemical weapons since World War I. A 1984 paper for the United States Army Command and Staff General College noted that the United States suffered over 70,000 casualties from German chemical weapons in that conflict, of which just over 1,400 were fatal.
A U.S. Soldier with the 76th Army Reserve Operational Response Command decontaminates a vehicle after a simulated chemical weapons attack during a base defense drill in Camp Taji, Iraq, July 23, 2016. This drill is one way Coalition forces maintain readiness and practice security procedures. Camp Taji is one of four Combined Joint Task Force – Operation Inherent Resolve build partner capacity locations dedicated to training Iraqi security forces. (U.S. Army photo by 1st Lt. Daniel Johnson/Released)
Military officials said a massive aerial attack on a former pharmaceutical plant near mosul Sept. 13 destroyed what they believe was an ISIS chemical weapons production facility.
Mustard gas, a liquid that is properly called "sulfur mustard," is a blister agent that not only can be inhaled, but also takes effect when it contacts the skin. This nasty chemical agent causes large blisters on the skin or in the lungs when inhaled. The agent can last a long time – unexploded shells filled with sulfur mustard have caused casualties in France and Belgium decades after the German surrender in World War I.
Chemical weapons were widely used in the Iran-Iraq War, most notoriously by Saddam Hussein's regime in Iraq during the Al-Anfar Offensive. The 1988 attack on the Kurdish town of Halabja, using nerve gas, gained world attention, particularly due to the casualties suffered by civilians. Chemical weapons use was widely feared during Operations Desert Shield and Desert Storm. After Desert Storm, Saddam Hussein's regime was supposed to end its chemical weapons program, but played a shell game for over a decade.
In the wake of the terrorist attacks on the World Trade Center and the Pentagon on September 11, 2001, concerns about Saddam Hussein's apparent non-compliance with the terms of the 1991 cease-fire and United Nations Security Council Resolutions lead the United States to launch Operation Iraqi Freedom in 2003.
While no large stockpiles of chemical weapons were found, coalition forces did encounter sarin nerve gas and sulfur mustard that had not been accounted for in pre-war inspections, and a 2014 report by the New York Times reported that over 5,000 shells filled with chemical weapons were found by American and Coalition forces during the Iraq War.
ISIS has been reported to use sulfur mustard against Iraqi and Syrian forces.