The Indian Mutiny of 1857 resulted in a change to British policy. The policies that were adopted by the British towards native states after the revolt of 1857 were to maintain the status quo of Indian states.
The Jallianwala Bagh massacre took place on 13 April 1919. The Acting Brigadier-General Reginald Dyer ordered troops of the British Indian Army to fire into the unarmed crowd. A total number of 379 people died and over 1,000 people injured.