Churchill was in no doubt that gas could be profitably employed against the Kurds and Iraqis (as well as against other peoples in the Empire): *I do not understand this sqeamishness about the use of gas. I am strongly in favour of using poison gas against uncivilised tribes.* Henry Wilson shared Churchills enthusiasm for gas as an instrument of colonial control but the British cabinet was reluctant to sanction the use of a weapon that had caused such misery and revulsion in the First World War. Churchill himself was keen to argue that gas, fired from ground-based guns or dropped from aircraft, would cause *only discomfort or illness, but not death* to dissident tribespeople; but his optimistic view of the effects of gas were mistaken. It was likely that the suggested gas would permanently damage eyesight and *kill children and sickly persons, more especially as the people against whom we intend to use it have no medical knowledge with which to supply antidotes.*
Churchill remained unimpressed by such considerations, arguing that the use of gas, a *scientific expedient,* should not be prevented *by the prejudices of those who do not think clearly*. In the event, gas was used against the Iraqi rebels with excellent moral effect* though gas shells were not dropped from aircraft because of practical difficulties [.....]
Today in 1993 there are still Iraqis and Kurds who remember being bombed and machine-gunned by the RAF in the 1920s. A Kurd from the Korak mountains commented, seventy years after the event: *They were bombing here in the Kaniya Khoran...Sometimes they raided three times a day.* Wing Commander Lewis, then of 30 Squadron (RAF), Iraq, recalls how quite often *one would get a signal that a certain Kurdish village would have to be bombed...*, the RAF pilots being ordered to bomb any Kurd who looked hostile. In the same vein, Squadron-Leader Kendal of 30 Squadron recalls that if the tribespeople were doing something they ought not be doing then you shot them.*
http://www.againstbombing.org/chemical.htm
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