By whose order did the massacre take place in Jallianwala Bagh?

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By whose order did the massacre take place in Jallianwala Bagh? Answer: Gen. Dyer

The massacre in Jallianwala Bagh on April 13, 1919, took place by the order of British Brigadier-General Reginald Dyer.Dyer marched his troops to the enclosed garden, sealed off the main exits, and, without any warning to the unarmed crowd to disperse, ordered his soldiers to open fire. The firing continued for approximately ten minutes, only ceasing when the troops ran out of ammunition.