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Regularly supported the regular forces during the troubles on the [[North West Frontier Campaigns|North West Frontier]] by manning armoured trains.

Volunteer regiments were formed during the [[First World War]]. [http://www.westernfrontassociation.com/great-war-on-land/75-other-war-theatres/1072-indian-volunteers-in-the-great-war-east-african-campaign.html Indian Volunteers in the Great War East African Campaign] gives details of The North-Western Railway Volunteers, who served in East Africa, although the Commonwealth War Graves Commission classifies them as an East African Protectorate unit in its records. This India List [http://archiver.rootsweb.ancestry.com/th/read/india/2000-01/0948180245 post ]indicates that the North Western Railway Volunteers served in Mesopotamia