Udham Singh an Indian revolutionary was one of the few survivors of the Jallianwala Bagh massacre in 1919. General Dyer commanded an open fire on the people protesting in Jallianwala Bagh. Udham Singh's life motive had become to kill General Dyer and the one who approved the command, Michael O'Dwyer. Although General Dyer was already dead but he killed Michael O'Dwyer in Caxton Hall, London.