From 1850 onwards these highly mobile batteries based on mule transport & \"screw-guns\" that broke down into portable components that could be off-loaded & into action in seconds, were utilised in every North West Frontier campaign & overseas in The Great War (Gallipoli, German East Africa, Persia & Mesopotamia.) & World War II (Ethiopia, Malaya & Burma). | The History of the Indian Mountain Artillery by C a L Graham, Paperback | Indigo Chapters