When the English imperialists attacked the Kurds for the oil 1918-1922.
They dropped SOUND BOMBS to create panic among Kurdish fighters.
The English used the first air squadron in history during this time in Kurdistan.
Neat full page cutaway image of "bomber"... aircraft set up to talk to Kurd rebels...
color and Athens... L'Arcopole acropolis 4 images
22 April 1933
An original 1933 publication