The Butcher of Amritsar refers to the crime that took place on what date?
The Butcher of Amritsar:  The book's title refers to the 1919 massacre at Jallianwala Bagh in which 379 people were shot by troops under the command of Dyer. Jallianwala Bagh massacre: The Jallianwala Bagh massacre, also known as the Amritsar massacre, took place on 13 April, 1919 when a crowd of non-violent protesters, along with Baishakhi pilgrims, who had gathered in Jallianwala Bagh, Amritsar, Punjab, were fired upon by troops of the British Indian Army under the command of Colonel Reginald Dyer.
i don't know