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.
Rowlatt Act also known as Black Act was passed by the Imperial Legislative Council in Delhi on 21 March 1919. It empowered the government to put anyone behind the bars without trial and conviction in court law. It basically suspended the right of Habeas Corpus. The word “Satyagraha” was used for the first time during Anti Rowlatt agitation.